WO2014069316A1 - エレクトロルミネッセンス基板およびその製造方法、エレクトロルミネッセンス表示パネル、エレクトロルミネッセンス表示装置 - Google Patents
エレクトロルミネッセンス基板およびその製造方法、エレクトロルミネッセンス表示パネル、エレクトロルミネッセンス表示装置 Download PDFInfo
- Publication number
- WO2014069316A1 WO2014069316A1 PCT/JP2013/078769 JP2013078769W WO2014069316A1 WO 2014069316 A1 WO2014069316 A1 WO 2014069316A1 JP 2013078769 W JP2013078769 W JP 2013078769W WO 2014069316 A1 WO2014069316 A1 WO 2014069316A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- semiconductor layer
- layer
- oxide semiconductor
- lower electrode
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 191
- 238000004519 manufacturing process Methods 0.000 title claims description 60
- 239000004065 semiconductor Substances 0.000 claims abstract description 226
- 230000001681 protective effect Effects 0.000 claims abstract description 48
- 239000010410 layer Substances 0.000 claims description 420
- 229910052751 metal Inorganic materials 0.000 claims description 89
- 239000002184 metal Substances 0.000 claims description 89
- 238000005401 electroluminescence Methods 0.000 claims description 79
- 238000000034 method Methods 0.000 claims description 73
- 239000003990 capacitor Substances 0.000 claims description 67
- 230000015572 biosynthetic process Effects 0.000 claims description 26
- 238000000059 patterning Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 23
- 229920002120 photoresistant polymer Polymers 0.000 claims description 9
- 238000004380 ashing Methods 0.000 claims description 8
- 239000011241 protective layer Substances 0.000 claims description 7
- 238000005530 etching Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 239000010408 film Substances 0.000 description 123
- 238000001312 dry etching Methods 0.000 description 11
- 239000003566 sealing material Substances 0.000 description 11
- 239000001257 hydrogen Substances 0.000 description 10
- 229910052739 hydrogen Inorganic materials 0.000 description 10
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000010936 titanium Substances 0.000 description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 9
- 238000007796 conventional method Methods 0.000 description 9
- 239000004020 conductor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 229910021417 amorphous silicon Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000000206 photolithography Methods 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 230000005525 hole transport Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000009832 plasma treatment Methods 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- 238000001039 wet etching Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 238000009429 electrical wiring Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 229910018507 Al—Ni Inorganic materials 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000052 poly(p-xylylene) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/674—Thin-film transistors [TFT] characterised by the active materials
- H10D30/6755—Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate
- H10D30/6756—Amorphous oxide semiconductors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D1/00—Resistors, capacitors or inductors
- H10D1/60—Capacitors
- H10D1/68—Capacitors having no potential barriers
- H10D1/692—Electrodes
- H10D1/696—Electrodes comprising multiple layers, e.g. comprising a barrier layer and a metal layer
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/6729—Thin-film transistors [TFT] characterised by the electrodes
- H10D30/6737—Thin-film transistors [TFT] characterised by the electrodes characterised by the electrode materials
- H10D30/6739—Conductor-insulator-semiconductor electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/674—Thin-film transistors [TFT] characterised by the active materials
- H10D30/6755—Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/62—Electrodes ohmically coupled to a semiconductor
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/421—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer
- H10D86/423—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/441—Interconnections, e.g. scanning lines
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/481—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs integrated with passive devices, e.g. auxiliary capacitors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D99/00—Subject matter not provided for in other groups of this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1216—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being capacitors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/124—Insulating layers formed between TFT elements and OLED elements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8051—Anodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/20—Changing the shape of the active layer in the devices, e.g. patterning
- H10K71/231—Changing the shape of the active layer in the devices, e.g. patterning by etching of existing layers
- H10K71/233—Changing the shape of the active layer in the devices, e.g. patterning by etching of existing layers by photolithographic etching
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/621—Providing a shape to conductive layers, e.g. patterning or selective deposition
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
Definitions
- the present invention relates to an electroluminescence element and a capacitor part, an electroluminescence substrate comprising a transistor electrically connected to each of the electroluminescence element and the capacitor part, a method for manufacturing the same, and an electroluminescence display comprising the electroluminescence substrate.
- the present invention relates to a panel and an electroluminescence display device.
- an EL (electroluminescence) display panel is known.
- An EL substrate used in an EL (organic EL, inorganic EL) display panel is an EL element (an organic EL element or an inorganic EL element) electrically connected to a transistor provided with a transistor such as a TFT (thin film transistor). ) Is provided.
- the EL substrate is provided with a plurality of gate lines, a plurality of source lines, and a plurality of drive power lines in order to output various signals to each pixel.
- These gate lines, source lines, drive power lines Each pixel surrounded by is provided with a switching transistor, a driving transistor, a Cs (capacitor) portion, and an EL element.
- These switching transistors, driving transistors, Cs parts, and EL elements each have a multilayer structure, and in order to form each layer, it is necessary to perform a photolithography process using a photomask.
- 18 (a) to 18 (i) are cross-sectional views illustrating a part of the manufacturing process of the organic EL display panel described in Patent Document 1 in the order of the processes.
- Patent Document 1 a solid gate metal 302 is first formed on an insulating substrate 301 as shown in FIG.
- the gate electrode 302G made of the gate metal 302, the signal line 302L, and Cs (capacitor not shown) Part lower electrode is formed.
- a gate insulating film 303, a semiconductor layer 304 made of amorphous silicon or polysilicon, and an insulating layer 305 made of silicon nitride or silicon oxide are formed on the insulating substrate 301 so as to cover the gate electrode 302G and the signal line 302L. Form a solid shape.
- the channel protective film 305a is formed by patterning the insulating layer 305 using a second photomask.
- an n + silicon layer 306 is formed in a solid shape on the semiconductor layer 304 so as to cover the channel protective film 305a. Subsequently, using a third photomask, a hole is formed in the gate insulating film 303, the semiconductor layer 304, and the n + silicon layer 306 at the contact hole formation position so that the gate metal 302 is exposed.
- the source metal 307 is formed in a solid shape.
- the gate metal 302 and the source metal 307 are joined by holes formed in the gate insulating film 303, the semiconductor layer 304, and the n + silicon layer 306, thereby forming a contact hole (not shown).
- the source metal 307 using a fourth photomask
- the upper electrode of the Cs portion (not shown), the source electrode 307S and the drain electrode 307D, and the illustration Scan lines and drive power supply lines that are not to be formed are formed.
- the semiconductor layer 304 and the n + silicon layer 306 using the fourth photomask, the semiconductor film 304 a made of the semiconductor layer 304 and the impurity semiconductor film 306 a made of the n + silicon layer 306. 306b is formed.
- a conductive film is formed by a vapor phase growth method, and a pixel electrode 308 is formed by patterning using a fifth photomask.
- a protective film 309 covering the source electrode 307S, the drain electrode 307D, the upper electrode and scanning line of the Cs portion (not shown), the drive power supply line, and the pixel electrode 308 is formed in a solid shape.
- an opening 309a for exposing the pixel electrode 308 is formed in the protective film 309 using a sixth photomask.
- a solid resin such as polyimide is applied on the protective film 309 and the pixel electrode 308, and then a seventh photomask is used.
- a mesh-like insulating film 310 By forming the mesh-like insulating film 310, the partition 311 including the protective film 309 and the mesh-like insulating film 310 is formed, and then an organic EL layer (not shown) is formed on the pixel electrode 308.
- a counter electrode (not shown) is formed thereon.
- a thermosetting resin such as an epoxy resin or an acrylic resin, a thermoplastic resin, a photocurable resin, or the like is applied on the counter electrode and cured to form a sealing layer.
- Patent Document 1 six photomasks are used until the opening 309a is formed in the protective film 309.
- Japanese Patent Publication Japanese Patent Laid-Open No. 2010-282807 (Released on Dec. 16, 2010)”
- Patent Document 1 conventionally, in order to manufacture an EL substrate used for an EL display panel, a large number of photomasks are required.
- a TFT backplane made of a TFT substrate is manufactured as a backplane, and a pixel electrode and a light emitting layer are formed on the TFT backplane. It is necessary to form a reflective electrode layer or the like as a counter electrode, and the number of processes is large.
- the conventional method requires a large number of photomasks and has a large number of processes. Therefore, an EL substrate, and further, an EL display panel and an EL display device cannot be manufactured at low cost. Since the number is large, the yield is low.
- the conventional EL substrate has a problem that it cannot be opened largely by the Cs portion.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to provide an EL substrate capable of reducing the number of manufacturing steps and the number of masks compared to the prior art, even when the bottom emission type is used.
- An object of the present invention is to provide an EL display panel, an EL display device, and a method for manufacturing such an EL substrate.
- An object of the present invention is to provide an EL substrate, an EL display panel, an EL display device, and a method for manufacturing such an EL substrate capable of improving the rate.
- an electroluminescent substrate includes a semiconductor layer of a transistor, a lower electrode of an electroluminescent element, and an upper electrode of a capacitor portion over a gate insulating film.
- a protective layer is provided over the semiconductor layer, the lower electrode, and the upper electrode, the protective layer having an opening that exposes the lower electrode and the upper electrode, and the semiconductor layer is an oxide. It is a semiconductor layer, and the lower electrode and the upper electrode are oxide semiconductor layer reduction electrodes formed by reducing an oxide semiconductor layer formed on the gate insulating film.
- the electroluminescence display panel and the electroluminescence display device according to one embodiment of the present invention include the electroluminescence substrate according to one embodiment of the present invention.
- a method for manufacturing an electroluminescent substrate includes a step of forming an oxide semiconductor layer over a gate insulating film, Patterning a pattern corresponding to the semiconductor layer, the lower electrode of the electroluminescent element, and the upper electrode of the capacitor portion; and corresponding to the lower electrode and the upper electrode on the upper layer of the oxide semiconductor layer pattern Forming a protective film having an opening for exposing a pattern of a portion; and using the protective film as a mask, the oxide semiconductor layer pattern includes a lower electrode of the electroluminescence element and an upper electrode of the capacitor section.
- the corresponding pattern is reduced by reducing the pattern of the corresponding part and comprising the reducing electrode of the oxide semiconductor layer. It is characterized by comprising a step of forming an upper electrode of the lower electrode and the capacitor unit of the luminescent element.
- the oxide semiconductor layer is reduced to a conductor. Moreover, the reduced oxide semiconductor layer is transparent and does not absorb visible light region wavelengths.
- the electroluminescence substrate is a bottom emission type
- a conventional ITO layer is not required as a transparent electrode in an electroluminescence element, and a semiconductor layer of a transistor
- the pattern, the lower electrode of the electroluminescence element, and the upper electrode of the capacitor portion can be formed simultaneously with one photomask. For this reason, it is possible to reduce the number of photomasks by one.
- a part of the oxide semiconductor layer is reduced to be a conductor and used as a transparent electrode, whereby the number of manufacturing steps can be reduced.
- FIG. 2 is an equivalent circuit diagram of one pixel in the element substrate shown in (a) to (d) of FIG.
- FIG. 4C is a cross-sectional view showing an example of the manufacturing process of the element substrate in the cross section taken along the line C1-C1 in order of the processes.
- (A) to (d) are cross sections taken along line A1-A1 and line B1-B1 shown in (a) of FIG.
- FIG. 4C is a cross-sectional view showing an example of the manufacturing process of the element substrate in the cross section taken along the line C1-C1 in order of the processes.
- FIG. 4A is a cross-sectional view taken along line A1-A1 of the element substrate according to the first embodiment.
- FIG. 4B is a diagram illustrating a case where a pixel electrode is manufactured by applying a conventional method in manufacturing the element substrate.
- FIG. 3 is a cross-sectional view of the element substrate taken along line A1-A1.
- FIG. 5A is a cross-sectional view taken along line B1-B1 of the element substrate according to the first embodiment, and FIG.
- FIG. 5B is a diagram when a Cs portion is manufactured by applying a conventional method in manufacturing the element substrate.
- FIG. 6 is a cross-sectional view of the element substrate taken along line B1-B1.
- A) is a top view which shows schematic structure of one pixel in the element substrate concerning Embodiment 2
- (b) is A2-A2 arrow sectional drawing of the element substrate shown to (a)
- (C) is a cross-sectional view taken along line B2-B2 of the element substrate shown in (a)
- (d) is a cross-sectional view taken along line C2-C2 of the element substrate shown in (a).
- FIG. 9A to 9E show an example of a manufacturing process of an element substrate in the A2-A2 arrow cross section, the B2-B2 arrow cross section, and the C2-C2 arrow cross section shown in FIG. It is sectional drawing shown to process order.
- (A) to (d) are cross sections taken along line A2-A2 and line B2-B2 shown in (a) of FIG. 9 after the steps shown in (a) to (e) of FIG.
- FIG. 5 is a cross-sectional view showing an example of the manufacturing process of the element substrate in the cross-section taken along arrows C2-C2 in order of the processes.
- FIGS. 12A to 12E show an example of a manufacturing process of the element substrate in the A3-A3 cross section, the B3-B3 cross section, and the C3-C3 cross section shown in FIG. It is sectional drawing shown to process order.
- FIG. 4 is a cross-sectional view showing an example of the manufacturing process of the element substrate in the cross-section taken along arrows C3-C3 in the order of the processes.
- (A) to (d) are cross sections taken along line A3-A3 and line B3-B3 shown in (a) of FIG. 12, after the steps shown in (a) to (d) of FIG.
- FIG. 4 is a cross-sectional view showing an example of the manufacturing process of the element substrate in the cross-section taken along arrows C3-C3 in the order of the processes.
- FIG. 10 is a cross-sectional view showing another example of the element substrate shown in FIG. 1A taken along the line A1-A1.
- (A)-(i) is sectional drawing which shows a part of manufacturing process of the organic electroluminescent display panel of patent document 1 in order of a process.
- an organic EL display device will be described as an example of an EL (electroluminescence) display device according to the present embodiment.
- FIG. 2 is a cross-sectional view showing a schematic configuration of a main part of the organic EL display device 100 according to the present embodiment.
- the organic EL display device 100 includes a pixel unit 101 and a circuit unit 102.
- the pixel unit 101 is composed of the organic EL display panel 1.
- the circuit unit 102 includes a circuit board provided with a drive circuit for driving the organic EL display device 100, an IC (Integrated Circuits) chip, and the like.
- the organic EL display panel 1 includes an element substrate 10 (organic EL substrate, organic EL element substrate) provided with an organic EL element 50, a counter substrate 70, a sealing material 81, and a filler 82 as necessary. ing.
- element substrate 10 organic EL substrate, organic EL element substrate
- the organic EL element 50 is formed by bonding the element substrate 10 to the counter substrate 70 via the sealing material 81 in order to protect the organic EL element 50 from moisture, oxygen, or external impact. Encapsulated between the substrates.
- the filler 82 is not essential, but is desirably filled between the pair of substrates in order to enhance the protection and maintain the gap between the substrates.
- an electrical wiring terminal 83 is provided outside the frame-shaped sealing region by the sealing material 81 in the element substrate 10.
- the electrical wiring terminal 83 is a connection terminal to which the connection terminal 103 of the circuit unit 102 is connected, and is formed of a wiring material such as metal.
- the circuit unit 102 is provided with wiring such as a flexible film cable, a drive circuit such as a driver, and the like. As shown in FIG. 2, the circuit unit 102 is connected to the organic EL display panel 1 through an electrical wiring terminal 83.
- FIG. 1A is a plan view showing a schematic configuration of one pixel in the element substrate 10 according to the present embodiment
- FIG. 1B is a plan view of the element substrate 10 shown in FIG.
- FIG. 1C is a cross-sectional view taken along line A1-A1
- FIG. 1C is a cross-sectional view taken along line B1-B1 of the element substrate 10 shown in FIG. 1A
- FIG. FIG. 2 is a cross-sectional view taken along line C1-C1 of the element substrate 10 shown in FIG.
- FIG. 3 is an equivalent circuit diagram of one pixel in the element substrate 10 shown in FIGS.
- pixels 2 of each color of R (red), G (green), and B (blue) are arranged in a matrix with a predetermined pattern.
- a plurality of gate lines 61 are arranged in parallel to each other along the row direction, and along the column direction so as to be orthogonal to the gate lines 61.
- a plurality of source lines 62 are arranged in parallel to each other.
- a drive power supply line 63 (voltage supply line) for driving the organic EL element 50 is provided between the adjacent gate lines 61 along the gate line 61.
- Each gate line 61 is connected to a gate driver (not shown) in the circuit unit 102, and each source line 62 is connected to a source driver (not shown) in the circuit unit 102.
- Each drive power supply line 63 is connected to a power supply circuit (not shown) in the circuit unit 102, and a predetermined voltage is supplied from the power supply circuit.
- Each pixel 2 includes a TFT (thin film transistor) as a switching transistor (first transistor). 20, a TFT 30 as a driving transistor (second transistor), a Cs (capacitor) unit 40, and an organic EL element 50 are provided.
- TFT thin film transistor
- first transistor switching transistor
- TFT 30 driving transistor
- Cs capacitor
- the TFT 20 includes a gate electrode 21, a gate insulating film 14 (first insulating film, see FIGS. 1B to 1D), a semiconductor layer 22, a source electrode 23, a drain electrode 24, and the like.
- the gate electrode 21 of the TFT 20 is connected to the gate line 61 and is one of the source electrode 23 and the drain electrode 24 (hereinafter referred to as the drain electrode 24 in the present embodiment, but is not limited thereto). ) Is connected to the source line 62.
- the other of the source electrode 23 and the drain electrode 24 (hereinafter referred to as the source electrode 23 in the present embodiment, but not limited thereto) is connected to the lower electrode 41 of the Cs portion 40. In addition, it is electrically connected to the gate electrode 31 of the TFT 30 via the Cs portion 40.
- the TFT 30 includes a gate electrode 31, a gate insulating film 14, a semiconductor layer 32, a source electrode 33, a drain electrode 34, and the like.
- the gate electrode 31 of the TFT 30 is connected to the lower electrode 41 of the Cs portion 40.
- one of the source electrode 33 and the drain electrode 34 of the TFT 30 (in this embodiment, the drain electrode 34) is connected to the drive power supply line 63.
- the electrode (hereinafter referred to as the drain electrode 34 in the present embodiment, but not limited thereto) is formed integrally with the drive power supply line 63.
- the other of the source electrode 33 and the drain electrode 34 (hereinafter referred to as the source electrode 33 in the present embodiment, but is not limited to this) is the upper electrode 42 (the first electrode 42) of the Cs portion 40. 2 and the pixel electrode 51 (see FIG. 1B) of the organic EL element 50.
- the lower electrode 41 (first capacitor electrode) of the Cs portion 40 and the upper electrode 42 are disposed so as to overlap each other with the gate insulating film 14 interposed therebetween.
- the Cs portion 40 forms a capacitor by accumulating charges between the lower electrode 41 and the upper electrode 42.
- the capacitor is provided to hold a voltage applied to the gate electrode 31 of the TFT 30.
- the upper electrode 42 is also used as a pixel electrode (first electrode, anode) in the light emitting region in the Cs portion 40.
- the organic EL element 50 is a light emitting element that can emit light with high luminance by low-voltage direct current drive. As shown in FIG. 1B, the pixel electrode 51 (first electrode, lower electrode of the organic EL element, anode) ), An organic EL layer 52, and a counter electrode 53 (second electrode, upper electrode of organic EL element, cathode) are laminated in this order.
- the organic EL layer 52 may be a single-layer type including only a light-emitting layer, or may be a multilayer type including a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and the like. There may be.
- the organic EL layer 52 from the pixel electrode 51 side for example, a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport.
- a layer, an electron injection layer, and the like are laminated in this order, and a counter electrode 53 is formed thereon.
- the pixel electrode 51 injects (supply) holes into the organic EL layer 52, and the counter electrode 53 injects (supply) electrons into the organic EL layer 52.
- a layer between the pixel electrode and the counter electrode is collectively referred to as an organic EL layer.
- a single layer may have two or more functions.
- the hole injection layer and the hole transport layer may be formed as independent layers as described above, or may be provided integrally with each other as the hole injection layer / hole transport layer.
- the electron transport layer and the electron injection layer may be formed as layers independent from each other as described above, or may be integrally provided as an electron transport layer / electron injection layer.
- a carrier blocking layer or the like for blocking the flow of carriers such as holes and electrons may be appropriately inserted.
- a hole blocking layer as a carrier blocking layer between the light emitting layer and the electron transporting layer, it is possible to prevent holes from escaping to the electron transporting layer and to improve the light emission efficiency.
- an electron blocking layer as a carrier blocking layer between the light emitting layer and the hole transport layer, it is possible to prevent electrons from escaping to the hole transport layer.
- the configuration of the organic EL layer 52 is not limited to the above-described exemplary layer configuration, and a desired layer configuration can be adopted according to the required characteristics of the organic EL element 50.
- the TFTs 20 and 30 are configured by bottom gate type (reverse stagger type) TFTs in which the gate electrodes 21 and 31 are provided below the semiconductor layers 22 and 32, respectively.
- the TFTs 20 and 30 are formed simultaneously using the same material. For this reason, the TFTs 20 and 30 are formed on the insulating substrate 11 with a gate electrode (gate electrodes 21 and 31), a gate insulating film 14, a semiconductor layer (semiconductor layers 22 and 32), a source electrode (source electrodes 23 and 33), and a drain.
- the electrodes (drain electrodes 24 and 25) are stacked in this order.
- the gate electrode 31 is formed of a transparent conductive layer 31a and a metal layer 31b stacked on the transparent conductive layer 31a.
- the transparent conductive layer 21a and a metal layer 21b laminated on the transparent conductive layer 21a are formed.
- the transparent conductive layers 21a and 31a and the metal layers 21b and 31b are formed by patterning the transparent conductive layer 12 and the metal layer 13 laminated on the insulating substrate 11, respectively.
- a lower electrode 41 made of a patterned transparent conductive layer 12 is formed on the insulating substrate 11. Is formed.
- the gate electrodes 21 and 31 and the lower electrode 41 are covered with a gate insulating film 14 (first insulating layer).
- the semiconductor layer 22 of the TFT 20 the semiconductor layer 32 of the TFT 30, the pixel electrode 51 of the organic EL element 50, and the Cs portion 40 upper electrodes 42 are formed.
- the semiconductor layers 22 and 32 are semiconductor layers composed of the patterned oxide semiconductor layer 15, and the pixel electrode 51 of the organic EL element 50 and the upper electrode 42 of the Cs portion 40 are patterned oxide semiconductor layers.
- 15 is a transparent electrode (reduction electrode of oxide semiconductor layer) made of a reduced oxide semiconductor layer 15 ′ formed by reducing 15.
- oxide semiconductor examples include InGaZnOx.
- the oxide semiconductor is preferably amorphous. Therefore, a (amorphous) -InGaZnOx is preferably used as the oxide semiconductor.
- the semiconductor layer 32 in the TFT 30 and the pixel electrode 51 of the organic EL element 50 connected to the TFT 30 are reduced by partially reducing the same oxide semiconductor layer 15.
- Two functional regions, a semiconductor region that becomes the semiconductor layer 32 of the TFT 30 and a reduction region that becomes the pixel electrode 51, are formed in one oxide semiconductor layer 15, and are formed integrally with each other.
- the semiconductor layer 22 in the TFT 20 and the upper electrode 42 of the Cs portion 40 connected to the TFT 20 are obtained by reducing a part of the same oxide semiconductor layer 15.
- two functional regions a semiconductor region that becomes the semiconductor layer 22 of the TFT 20 and a reduction region that becomes the upper electrode 42, are formed.
- the TFTs 20 and 30 according to the present embodiment are top contact type transistors in which source electrodes 23 and 33 and drain electrodes 24 and 34 are provided on the gate insulating film 14 via semiconductor layers 22 and 32, respectively. .
- one of the source electrode 33 and the drain electrode 34 of the TFT 30 connected to the organic EL element 50 is a pixel electrode 51 provided integrally with the semiconductor layer 32. It is in contact with the top edge of the.
- one of the source electrode 23 and the drain electrode 24 of the TFT 20 (in this embodiment, the source electrode 23) is a Cs portion through an opening 14a provided in the gate insulating film 14 serving as a contact hole. 40 is in contact with the upper surface of the lower electrode 41.
- a common protective film having openings 17a and 17b shown in FIGS. It is covered with an insulating layer 17. These openings 17a and 17b are provided so as to expose the pixel electrodes used as the lower electrodes of the light emitting section (that is, the pixel electrodes 51 of the organic EL element 50 and the upper electrodes 42 used as the pixel electrodes of the Cs section 40). It has been.
- the protective film 17 prevents a short circuit between the upper electrode and the lower electrode sandwiching the organic EL layer, and also functions as a partition wall used as an element isolation film.
- the organic EL layer 52 is formed in the openings 17a and 17b. Is provided.
- a counter electrode 53 is provided as an upper electrode of the light emitting portion.
- a constant voltage Vcom is applied to the counter electrode 53 (for example, grounded).
- the transparent conductive layer 12 for example, ITO (indium tin oxide), IZO (indium zinc oxide), gallium-doped zinc oxide (GZO), or the like can be used.
- ITO indium tin oxide
- IZO indium zinc oxide
- GZO gallium-doped zinc oxide
- metal layers 13 and 16 for example, a single layer film or a multilayer film of a metal such as Ni (nickel), Al (aluminum), W (tungsten), TaN (tantalum nitride), Ti (titanium), or the like is used. Can do.
- a metal such as Ni (nickel), Al (aluminum), W (tungsten), TaN (tantalum nitride), Ti (titanium), or the like is used. Can do.
- the gate insulating film 14 and the protective film 17 for example, a SiO 2 (silicon oxide) film, SiN (silicon nitride film), or the like can be used.
- the counter electrode 53 for example, a reflective electrode made of a metal material such as Al, Ag (silver), Mo (molybdenum), Al—Ni (nickel) alloy or the like can be used.
- the counter electrode 53 may be a laminated film of a step covering layer and a resistance reducing layer, as shown in Patent Document 1, for example.
- the step covering layer is preferably made of a material having high conductivity and step coverage, and for example, ITO or InZnO (zinc-doped indium oxide) can be used.
- the resistance reducing layer may be any layer that can reflect the light emitted from the light emitting layer to the cathode side to the anode side.
- an Al—Ni alloy or the like can be used.
- the element substrate 10 is sealed to prevent oxygen and moisture from entering the organic EL layer 52 from the outside on the counter electrode 53 so as to cover the counter electrode 53, for example.
- a stop film may be provided. Thereby, for example, the organic EL layer 52 can be protected from moisture entering from the contact interface with the sealing material 81.
- Such a sealing film is known as disclosed in Patent Document 1, and the material of the sealing film is not particularly limited.
- Si silicon
- Al Films made of inorganic materials such as oxides (SiO 2 , Al 2 O 3 etc.) and nitrides (SiNx, SiCN), or films made of organic materials such as acrylate, polyurea, parylene, polyimide, polyamide, etc.
- organic materials such as acrylate, polyurea, parylene, polyimide, polyamide, etc.
- an EL display panel is formed by bonding the element substrate 10 to the counter substrate 70 that is a sealing substrate.
- the element substrate 10 can be used as an EL display panel.
- counter substrate 70 generally, a glass substrate or a plastic substrate having translucency is used.
- An example of the counter substrate 70 is a transparent insulating substrate such as an alkali-free glass substrate, but an opaque material such as a metal plate may be used.
- sealing material 81 and the filling material 82 known sealing materials and filling materials used in EL display devices can be used.
- sealing material 81 a known sealing material used for bonding substrates such as an ultraviolet curable resin such as an epoxy resin adhesive or a thermosetting resin can be used.
- the filler 82 for example, a resin such as an epoxy resin or a silicon resin can be used.
- the filler 82 may or may not have adhesiveness, and may contain a desiccant.
- FIG. 6 is a cross-sectional view showing an example of a method for manufacturing the element substrate 10 in the cross section taken along the line C1-C1 in the order of steps.
- the TFTs 20 and 30 are formed simultaneously using the same material. Therefore, the gate electrode 21 and the gate electrode 31, the semiconductor layer 22 and the semiconductor layer 32, the source electrode 23 and the drain electrode 24, the source electrode 33, and the drain electrode 34 are simultaneously formed using the same material by the same method. It is formed.
- a region in which the organic EL element 50 is formed is referred to as a “pixel region”
- a region in which the Cs portion 40 is formed is referred to as a “Cs region”
- a region in which the TFTs 20 and 30 are formed This is referred to as “transistor region”.
- a transparent conductive layer 12 and a metal layer 13 are laminated in this order on an insulating substrate 11 such as a glass substrate.
- a photoresist is laminated on the metal layer 13, and a halftone mask (not shown) in which a portion having different light transmittance is provided on one mask is used as a first photomask.
- Halftone exposure is performed by changing the exposure amount in each region.
- the transistor region and the Cs region are formed by the photoresist so that the resist pattern 201a in each transistor region is thicker than the resist pattern 201b in the Cs region.
- resist patterns 201a and 201b having different thicknesses are formed.
- the metal layer 13 is patterned by dry etching using the resist patterns 201a and 201b as a mask, and then transparent using the resist patterns 201a and 201b and the patterned metal layer 13 as a mask.
- the conductive layer 12 is patterned by wet etching.
- the patterned metal layer 13 and transparent conductive layer 12 in the transistor region are used as the gate electrodes 21 and 31 and the gate line 61.
- a stacked electrode composed of the patterned metal layer 13 and the patterned transparent conductive layer 12 is formed as the gate electrodes 21 and 31 and the gate line 61.
- the patterned transparent conductive layer 12 in the Cs region is used as the lower electrode 41 of the Cs portion 40 (first electrode of the Cs portion 40).
- etching liquid used for the wet etching of a transparent conductive film As an etching liquid used for the said wet etching.
- etching solution for example, a mixed solution of phosphoric acid, nitric acid, and acetic acid, oxalic acid, or the like can be used.
- a commercially available general dry etching apparatus can be used for the dry etching.
- the surfaces of the resist patterns 201a and 201b are decomposed / removed by ashing and retreated.
- the resist pattern 201a is thinned while the resist pattern 201b is completely removed.
- the surface of the metal layer 13 in the Cs region is exposed.
- ashing for example, O 2 ashing processing can be used.
- a commercially available general ashing apparatus can be used as the dry etching apparatus used for ashing.
- the metal layer 13 on the transparent conductive layer 12 in the Cs region is completely removed by dry etching. Thereby, the surface of the transparent conductive layer 12 in the Cs region (that is, the surface of the lower electrode 41) is exposed.
- gate insulating film 14 (Process for forming gate insulating film 14) Next, as shown in FIG. 5B, a gate insulating film 14 (first insulating layer) is laminated so as to cover the metal layer 13 and the transparent conductive layer 12.
- a SiO 2 (silicon oxide) film and a SiN (silicon nitride film) film are continuously deposited by a CVD (chemical vapor deposition) apparatus.
- the thickness of the SiO2 film was 50 nm
- the thickness of the SiN film was 325 nm.
- the opening 14a serving as a contact hole between the source electrode 23 and the lower electrode 41 of the Cs portion 40 and the terminal portion of the gate line 61 are illustrated by photolithography and dry etching. Opening not to be formed.
- an oxide semiconductor layer 15 is deposited on the gate insulating film 14. Note that in this embodiment, an a-InGaZnOx layer is deposited as the oxide semiconductor layer 15 with a thickness of 50 nm by a sputtering apparatus.
- a photoresist (not shown) is stacked on the oxide semiconductor layer 15, and the oxide semiconductor is subjected to photolithography and wet etching using a third photomask (not shown).
- Layer 15 is processed into the desired pattern. Specifically, the oxide semiconductor layer 15 is patterned so as to correspond to the pixel electrode pattern of the organic EL element 50, the semiconductor pattern of the TFTs 20 and 30, and the upper electrode pattern of the Cs portion 40.
- the pixel electrode pattern of the organic EL element 50 is formed integrally with the semiconductor pattern of the TFT 30 electrically connected to the organic EL element 50. That is, the pixel electrode pattern of the organic EL element 50 is formed as an extended portion of the semiconductor pattern of the TFT 30.
- a metal layer 16 (source metal layer, second metal layer) is deposited on the gate insulating film 14 so as to cover the semiconductor pattern of the TFTs 20 and 30, and then a fourth photomask (not shown) is formed.
- the metal layer 16 is processed into a desired pattern by photolithography and dry etching used. Thereby, the source electrodes 23 and 33, the drain electrodes 24 and 34, the source line 62, and the drive power supply line 63 made of the metal layer 16 are formed, and the source electrode 23 is formed below the Cs portion 40 in the opening 14a.
- the TFT 20 connected to the electrode 41 is formed.
- Ti titanium
- Al aluminum
- Ti titanium
- Ti titanium
- Al aluminum
- Ti titanium
- a SiO 2 film is deposited with a thickness of 200 nm.
- the oxide semiconductor layer 15 (reduced oxide semiconductor layer 15 ′) reduced in the pixel region is used as the pixel electrode 51 of the organic EL element 50.
- the pixel electrode 51 formed integrally with the semiconductor layer 32 made of the oxide semiconductor layer 15 was formed, and the TFT 30 in which the source electrode 33 was directly connected to the pixel electrode 51 was formed.
- the oxide semiconductor layer 15 reduced oxide semiconductor layer 15 ′ reduced in the Cs region is used as the upper electrode 42 of the Cs portion 40.
- the upper electrode 42 made of the reduced oxide semiconductor layer 15 ′ is formed simultaneously with the TFT 30, and the lower electrode 41 made of the transparent conductive layer 12 is overlapped with the upper electrode 42 through the gate insulating film 14. Cs portion 40 was formed.
- conditions for hydrogen plasma treatment are not particularly limited as long as the oxide semiconductor layer 15 exposed from the protective film 17 is completely reduced by the openings 17a and 17b.
- the oxide semiconductor layer 15 in the region is not reduced, the contact resistance between the metal layer and the oxide semiconductor layer 15 is large, and thus the pixel electrode 51 formed of the oxide semiconductor layer 15 that is not reduced is used. The pixel potential cannot be charged sufficiently.
- the inventors of the present application have confirmed by experiment that the pixel potential can be sufficiently charged in the pixel electrode 51, and have confirmed that the oxide semiconductor layer 15 in the region is naturally reduced.
- the region where the oxide semiconductor layer 15 which is not exposed is reduced is several ⁇ m or less, and the source electrode is provided on the edge of the opening 17b on the TFT 20 side and on the edge of the opening 17a on the TFT 30 side.
- the oxide semiconductor layer 15 in the semiconductor layer formation region of the TFTs 20 and 30 is not reduced.
- the organic EL layer 52 is formed in the openings 17a and 17b.
- a method for forming the organic EL layer 52 an inkjet method may be used, or a mask may be used to form the organic EL layer 52 by a sputtering method, a vacuum deposition method, or the like.
- the formation method itself of the organic EL layer 52 can apply the same method as the manufacturing method of the organic EL layer in a general organic EL display device.
- the conductive layer 18 is laminated on the insulating substrate 11, and the conductive layer 18 is connected to the pixel electrode 51 of the organic EL element 50 via the organic EL layer 52 using a sixth photomask (not shown). Then, the counter electrode 53 is formed as shown in FIG. 1 (m) by overlapping the upper electrode 42 of the Cs portion 40 and patterning so as to cover the TFTs 20 and 30.
- Mo mobdenum
- Al are deposited in this order in a thickness of 100 nm as the conductive layer used for the counter electrode 53, respectively.
- a sealing film is formed so as to cover the counter electrode 53, and the element substrate 10 obtained in this way is bonded to the counter substrate 70 through a sealing material 81.
- the filler 82 may be applied to any substrate before the element substrate 10 and the counter electrode 53 are bonded together, and after the element substrate 10 and the counter electrode 53 are bonded together except for the injection port. The liquid may be injected from the injection port.
- a vacuum bonding apparatus or the like is used for bonding the substrates. After bonding the pair of substrates in this manner, the sealing material 81 is cured by heat or ultraviolet rays, whereby the organic EL display panel 1 shown in FIG. 2 is manufactured.
- each component in each substrate described above may be appropriately set to a desired thickness and size according to the application and the like, and are not particularly limited.
- the thickness and size of these components can be set, for example, in the same manner as in the past.
- FIG. 7A is a cross-sectional view taken along line A1-A1 of the element substrate 10 according to the present embodiment, and FIG. 7B applies a conventional method in manufacturing the element substrate 10.
- FIG. FIG. 3 is a cross-sectional view taken along line A1-A1 of the element substrate 10 when a pixel electrode is manufactured.
- the organic EL layer 52 and the counter electrode 53 are not shown.
- FIG. 8A is a cross-sectional view taken along line B1-B1 of the element substrate 10 according to the present embodiment
- FIG. 8B is a conventional method for manufacturing the element substrate 10.
- FIG. 6 is a cross-sectional view taken along line B1-B1 of the element substrate 10 when the Cs portion 40 is manufactured by applying the above.
- a transparent conductive film such as ITO is generally used for a pixel electrode of a light emitting unit in a bottom emission type element substrate.
- the transparent conductive material used for the semiconductor layer 211 and the pixel electrode 212 of the TFT 30 is laminated and patterned by different materials and in different processes. For this reason, different photomasks are required for patterning the semiconductor layer 211 and patterning the pixel electrode 212. Therefore, one photomask for forming the pixel electrode 212 is necessary for forming the pixel electrode 212.
- the oxide semiconductor layer 15 formed on the gate insulating film 14 is patterned to form the semiconductor layers 22 and 32 of the TFTs 20 and 30 and the pixel electrode 51 of the organic EL element 50. Then, a pattern corresponding to the upper electrode 42 of the Cs portion 40 is formed, and a part of the oxide semiconductor layer 15 is reduced by hydrogen plasma or the like using the protective film 17 as a mask, so that one photomask Thus, a pattern corresponding to the semiconductor layers 22 and 32 of the TFTs 20 and 30, the pixel electrode 51 of the organic EL element 50, and the upper electrode 42 of the Cs portion 40 can be formed.
- the reduced oxide semiconductor layer 15 ′ does not absorb visible light wavelength, and can be used as a bottom emission type pixel electrode. Therefore, the reduced oxide semiconductor layer 15 ′ can be used as the pixel electrode 51 that is the lower electrode of the organic EL element 50, and also serves as the pixel electrode of the light emitting portion in the Cs portion 40, as described above. It can be used as the upper electrode 42 of the Cs portion 40.
- the conventional ITO layer is not required for forming the pixel electrode, and the pattern of the semiconductor layer of the TFTs 20 and 30 and the pattern of the pixel electrode 51 are simultaneously formed with one photomask. Since it can be formed, one photomask can be reduced.
- a part of the oxide semiconductor layer 15 is reduced to be a conductor and used as a transparent electrode (that is, the pixel electrode 51 and the upper electrode 42).
- the number of processes can be reduced.
- the Cs portion is generally formed of a gate metal and a source metal.
- the Cs portion 40 is manufactured by applying a conventional method in the manufacture of the element substrate 10, as shown in FIG. 8B, a metal layer provided with the gate insulating film 14 interposed therebetween. 13 (first metal layer) and metal layer 16 (second metal layer) form a Cs portion 40.
- the bottom emission type EL display panel has a disadvantage in the aperture ratio compared to the top emission type EL display panel.
- the transparent conductive layer 12 is provided under the metal layer 13 that is the gate metal, and the gate electrodes 21 and 31 and the gate line 61 are connected to the transparent conductive layer 12 and the metal. While the laminated structure with the layer 13 is formed, the lower electrode 41 of the Cs portion 40 is formed by the transparent conductive layer 12 by a halftone process, and a part of the oxide semiconductor layer 15 is reduced, whereby the Cs portion 40 is formed.
- the upper electrode 42 is formed.
- the lower electrode 41 and the upper electrode 42 of the Cs portion 40 are both made of transparent electrodes, so that light is transmitted through the Cs portion 40. Therefore, according to the present embodiment, the upper electrode 42 of the Cs portion 40 can be used as the pixel electrode of the light emitting portion. Therefore, according to the present embodiment, as shown in FIG. 8A, by forming the organic EL layer 52 and the counter electrode 53 on the upper electrode 42, the light emitting portion is also formed on the Cs portion 40. Can be formed. For this reason, an aperture ratio can be improved also by bottom emission.
- the lower electrode 41 and the upper electrode 42 of the Cs portion 40 are formed of the transparent conductive layer 12 formed simultaneously with the gate electrodes 21 and 31, and the TFTs 20 and 30.
- the oxide semiconductor layer 15 pattern formed at the same time as the semiconductor layer pattern with a reduced transparent electrode the number of steps and the number of masks are reduced compared to the conventional method, and the aperture ratio is improved by bottom emission. Can be made.
- a TFT using an oxide semiconductor has a higher amount of current (that is, electron mobility) in an on state than a TFT using a-Si.
- a TFT using a-Si has an Id current (a source ⁇ in the TFT) at the time of the TFT-on (a period in which the TFT is on according to the voltage value of the on-voltage) Whereas the current amount between drains) is 1 ⁇ A, a TFT using an oxide semiconductor has an Id current of about 20 to 50 ⁇ A at the time of TFT-on.
- a TFT using an oxide semiconductor has an electron mobility about 20 to 50 times higher in an on state than a TFT using a-Si, and has an excellent on-characteristic. .
- a TFT using an oxide semiconductor has an off-state current (that is, a leakage current) of TFT using a-Si or TFT using LTPS (Low (Temperature Poly Silicon). Less than.
- a TFT using a-Si has an Id current of 10 pA at the time of TFT-off (a period in which the TFT is turned off according to the voltage value of the on-voltage), whereas an oxide semiconductor The TFT using the TFT has an Id current of about 0.1 pA at the time of TFT-off.
- the TFT using an oxide semiconductor has a leakage current in an off state of about 1/100 of that of a TFT using a-Si, and no leakage current is generated. It turns out that it is excellent.
- the organic EL display panel 1 according to the present embodiment employs TFTs 20 and 30 using an oxide semiconductor for each pixel 2, and the TFTs 20 and 30 have excellent on characteristics as described above. Therefore, the size of the TFTs 20 and 30 in each pixel 2 can be reduced.
- FIG. 9A is a plan view showing a schematic configuration of one pixel in the element substrate 10 according to the present embodiment
- FIG. 9B is a diagram of the element substrate 10 shown in FIG. 9 is a cross-sectional view taken along line A2-A2
- FIG. 9C is a cross-sectional view taken along line B2-B2 of the element substrate 10 shown in FIG. 9A
- FIG. 10 is a cross-sectional view taken along line C2-C2 of the element substrate 10 shown in FIG.
- FIG. 9 (a) as in FIG. 1 (a), for convenience of illustration, some components are omitted.
- the organic EL display device 100 and the organic EL display panel 1 according to the present embodiment include the gate electrodes 21 and 31 of the TFTs 20 and 30 and the Cs portion in the element substrate 10.
- the lower electrode 41 is made of the metal layer 13 (gate metal)
- the organic EL layer 52 and the counter electrode 53 are not provided on the Cs portion 40.
- FIG. 11 is cross sections taken along line A2-A2 shown in FIG. It is sectional drawing which shows an example of the manufacturing method of the element substrate 10 in a C2 arrow cross section in order of a process.
- the cross section taken along line A2-A2 shown in FIG. 9 (a), the cross section taken along line B2-B2, and the cross section taken along arrow C2-C2 are respectively taken along line A1-A1 shown in FIG. This corresponds to a cross section taken along the line B1-B1 and a cross section taken along the line C1-C1.
- a metal layer 13 (gate metal layer, first metal layer) is laminated in a solid shape on an insulating substrate 11 such as a glass substrate.
- a photoresist (not shown) is laminated on the metal layer 13, and the metal layer 13 is patterned (patterned) by a photolithography method and a dry etching method using a first photomask (not shown). As shown in (b), an electrode pattern made of the metal layer 13 is formed.
- a dry etching apparatus similar to the dry etching apparatus used for patterning the metal layer 13 in the first embodiment can be used.
- the patterned metal layer 13 in the pixel region is used as the gate electrodes 21 and 31 and the gate line 61 as in the first embodiment.
- the patterned metal layer 13 in the Cs region is used as the lower electrode 41 of the Cs portion 40 (first electrode of the Cs portion 40).
- the steps shown in FIGS. 10C to 10E and FIGS. 11A to 11D have a single-layer structure in which the gate electrodes 21 and 31 and the gate line 61 are the metal layer 13, and the Cs portion Steps shown in FIGS. 5B to 5D and FIGS. 6A to 6D in Embodiment 1 except that the 40 lower electrodes 41 are formed of the patterned metal layer 13. Is the same. Therefore, the description thereof is omitted here.
- the oxide semiconductor layer 15 formed on the gate insulating film 14 is patterned to form the semiconductor layers 22 and 32 of the TFTs 20 and 30 and the pixel electrode of the organic EL element 50 as in the first embodiment. 51 and a pattern corresponding to the upper electrode 42 of the Cs portion 40 are formed, and a part of the oxide semiconductor layer 15 is reduced by hydrogen plasma or the like using the protective film 17 as a mask. With the mask, patterns corresponding to the semiconductor layers 22 and 32 of the TFTs 20 and 30, the pixel electrode 51 of the organic EL element 50, and the upper electrode 42 of the Cs portion 40 can be formed.
- the conventional ITO layer is not required for the formation of the pixel electrode, and the pattern of the semiconductor layer of the TFTs 20 and 30 and the pattern of the pixel electrode 51 are simultaneously formed with one photomask. Therefore, one photomask can be reduced.
- a part of the oxide semiconductor layer 15 is reduced to be a conductor and used as a transparent electrode (that is, the pixel electrode 51 and the upper electrode 42).
- the number of processes can be reduced.
- the manufacturing process of the element substrate 10 by not using the halftone process, the manufacturing process of the element substrate 10, and thus the organic EL display panel 1 and the organic EL display device 100 is simplified as compared with the first embodiment. can do.
- FIG. 12A is a plan view showing a schematic configuration of one pixel in the element substrate 10 according to the present embodiment
- FIG. 12B is a diagram of the element substrate 10 shown in FIG.
- FIG. 12C is a cross-sectional view taken along line A3-A3
- FIG. 12C is a cross-sectional view taken along line B3-B3 of the element substrate 10 shown in FIG. 12A
- FIG. FIG. 13 is a cross sectional view taken along line C3-C3 of the element substrate 10 shown in FIG.
- FIG. 12 (a) as in FIG. 1 (a), for convenience of illustration, some components are not shown.
- the TFTs 20 and 30 each have a top contact structure in which the source electrodes 23 and 33 and the drain electrodes 24 and 34 are provided on the gate insulating film 14 via the semiconductor layers 22 and 32, respectively.
- the case has been described as an example.
- the TFTs 20 and 30 are formed on the gate insulating film 14 as shown in FIGS. It has a bottom contact structure in which the semiconductor layers 22 and 32 are provided so as to cover the source electrodes 23 and 33 and the drain electrodes 24 and 34, whereby the pixel electrode 51 of the organic EL element 50 is arranged on the side surface of the source electrode 33 of the TFT 30. Is the same as the organic EL display device 100 and the organic EL display panel 1 according to Embodiment 1.
- FIG. 13 are cross sections taken along line A3-A3, line B3-B3, and line C3- It is sectional drawing which shows an example of the manufacturing method of the element substrate 10 in a C3 arrow cross section in order of a process.
- the A3-A3 arrow cross section, the B3-B3 arrow cross section, and the C3-C3 arrow cross section shown in FIG. 12A are respectively the A1-A1 arrow arrows shown in FIG. This corresponds to a cross section taken along the line B1-B1 and a cross section taken along the line C1-C1.
- FIGS. 13A to 13E and FIGS. 14A and 14B are the same as those shown in FIGS. 4A to 4E and FIG. This is the same as the step shown in (b). Therefore, the description thereof is omitted here.
- a metal layer is formed on the gate insulating film 14 so as to cover the gate electrodes 21 and 31 of the TFTs 20 and 30.
- the metal layer 16 is processed into a desired pattern as shown in FIG. 14C by photolithography and dry etching using a third photomask (not shown). Thereby, the source electrodes 23 and 33, the drain electrodes 24 and 34, the source line 62, and the drive power supply line 63 made of the metal layer 16 are formed, and the source electrode 23 and the lower electrode 41 of the Cs portion 40 are opened. It connects by the part 14a.
- Ti, Al, and Ti are deposited as the source metal layer in this order in the thicknesses of 50 nm, 200 nm, and 100 nm by the sputtering apparatus as in the first embodiment.
- Source electrodes 23 and 33, drain electrodes 24 and 34, source lines 62, and drive power supply lines 63 having a three-layer structure of Al / Ti were formed.
- an oxide semiconductor layer 15 is deposited on the gate insulating film 14 so as to cover the metal layer 16. Note that also in this embodiment, as the oxide semiconductor layer 15, an a-InGaZnOx layer was deposited to a thickness of 50 nm by a sputtering apparatus as in Embodiment 1.
- a photoresist (not shown) is stacked on the oxide semiconductor layer 15, and the oxide semiconductor is subjected to photolithography and wet etching using a fourth photomask (not shown).
- Layer 15 is processed into the desired pattern. Specifically, the oxide semiconductor layer 15 is patterned so as to correspond to the pixel electrode pattern of the organic EL element 50, the semiconductor pattern of the TFTs 20 and 30, and the upper electrode pattern of the Cs portion 40. Thereby, the TFT 20 in which the oxide semiconductor layer 15 is provided on the gate insulating film 14 so as to cover the source electrode 23 and the drain electrode 24 is formed.
- the pixel electrode pattern of the organic EL element 50 is formed as an extended portion of the semiconductor pattern of the TFT 30.
- a SiO 2 film having a thickness of 200 nm is deposited as the protective film 17 as in the first embodiment.
- the pixel electrode 51 formed integrally with the semiconductor layer 32 made of the oxide semiconductor layer 15 is formed, and for example, the TFT 30 in which the source electrode 33 is directly connected to the pixel electrode 51 is formed. did.
- the upper electrode 42 made of the reduced oxide semiconductor layer 15 ′ is formed, and the lower electrode 41 made of the transparent conductive layer 12 is overlapped with the upper electrode 42 through the gate insulating film 14. Formed.
- the TFTs 20 and 30 have a bottom contact structure in which the oxide semiconductor layer 15 is provided on the gate insulating film 14 so as to cover the source electrodes 23 and 33 and the drain electrodes 24 and 34, and the organic EL
- the organic EL display panel 1 in which the pixel electrode 51 of the element 50 is provided in contact with the side surface of the source electrode 33 is produced.
- the pattern of the semiconductor layers of the TFTs 20 and 30 and the pixel electrodes 51 are also provided in this embodiment.
- the pattern can be simultaneously formed with one photomask, and part of the oxide semiconductor layer 15 is reduced to be a conductor and used as a transparent electrode, so that the same effect as that of Embodiment 1 can be obtained. It goes without saying that you can get it.
- FIG. 16A is a cross-sectional view taken along the line A3-A3 of the element substrate 10 according to the present embodiment
- FIG. 16B is A1-A1 of the element substrate 10 according to the first embodiment.
- FIG. In the following, description will be made with reference to the A3-A3 arrow sectional view and the A1-A1 arrow sectional view of the element substrate 10 shown in FIGS. 16 (a) and 16 (b). It goes without saying that this can also be said in the cross-sectional view taken along line C3-C3 and the line C1-C1 of the substrate 10.
- the TFTs 20 and 30 When the TFTs 20 and 30 have a top contact structure as shown in the first embodiment, they are under the metal layer 16 (source metal) during reduction as shown by a two-dot chain line in FIG. The region may be behind the metal layer 16 and not fully reduced. If the reduction is not sufficiently performed, there is a possibility that the pixel electrode 51 does not sufficiently contact the metal layer 16. Similarly, in the cross section taken along line C1-C1, there is a possibility that the upper electrode 42 of the Cs portion 40 does not contact the metal layer 16 sufficiently.
- the pixel electrode 51 of the organic EL element 50 is formed as a source electrode as shown in FIG.
- the reduced region of these oxide semiconductor layers 15 that is, the reduced oxide semiconductor layer 15 ′
- the source electrode 33 By contacting the side surface of 33, the reduced region of these oxide semiconductor layers 15 (that is, the reduced oxide semiconductor layer 15 ′) can be brought into sufficient and reliable contact with the source electrode 33.
- the pixel electrode pattern of the organic EL element 50 is not necessarily formed integrally with the semiconductor pattern of the TFT 30.
- FIG. 17 is a cross-sectional view showing another example of the element substrate 10 shown in FIG.
- FIG. 17 shows an example in which the pixel electrode pattern of the organic EL element 50 is formed apart from the semiconductor pattern of the TFT 30.
- either one of the source electrode 33 and the drain electrode 34 (for example, the same effect as that of the first embodiment can be obtained by forming the pattern so that the source electrode 34) is in contact with the upper end of the pixel electrode pattern of the organic EL element 50.
- Embodiments 1 to 3 the case where hydrogen plasma treatment is used for reduction of the oxide semiconductor layer 15 has been described as an example.
- the reduction method of the oxide semiconductor layer 15 is not limited thereto. Absent.
- a method of doping the oxide semiconductor layer 15 with hydrogen ions or boron ions can be used.
- the organic EL element and the inorganic EL element differ only in material, and the element substrate 10 is an inorganic EL substrate (inorganic EL element substrate) provided with an inorganic EL element instead of the organic EL element 50. Needless to say, you can. That is, the EL substrate, EL display panel, and EL display device according to the first to third embodiments may be an inorganic EL substrate, an inorganic EL display panel, or an inorganic EL display device.
- an electroluminescence substrate includes a semiconductor layer of a transistor, a lower electrode of an electroluminescence element, and an upper electrode of a capacitor portion provided over a gate insulating film.
- a protective layer is provided above the lower electrode and the upper electrode, the protective layer has an opening exposing the lower electrode and the upper electrode, and the semiconductor layer is an oxide semiconductor layer
- the lower electrode and the upper electrode are configured to be oxide semiconductor layer reduction electrodes formed by reducing the oxide semiconductor layer formed on the gate insulating film.
- the electroluminescence substrate includes a transistor having a semiconductor layer provided on a gate electrode formed on a semiconductor substrate via a gate insulating film, and a lower portion provided on the gate insulating film.
- An electroluminescence element in which a second electrode as an upper electrode is provided on a first electrode as an electrode via a light emitting layer, and an upper portion on the first capacitor electrode as a lower electrode via the gate insulating film.
- a capacitor portion provided with a second capacitor electrode, which is an electrode, and a protective layer is provided on the semiconductor layer, the first electrode, and the second capacitor electrode.
- An opening for exposing the first electrode and the second capacitor electrode; the semiconductor layer is an oxide semiconductor layer; and the first electrode and the second capacitor electrode are the gate insulating film.
- the semiconductor layer of the transistor, the lower electrode of the electroluminescence element, and the upper electrode of the capacitor part are all provided on the gate insulating film and are all made of an oxide semiconductor layer. Therefore, by patterning the oxide semiconductor layer, it is possible to simultaneously pattern using a single photomask, and using the protective film as a mask, the lower electrode of the electroluminescent element and the capacitor portion By reducing the pattern of the portion corresponding to the upper electrode, it is possible to form the lower electrode of the electroluminescence element and the upper electrode of the capacitor portion, which are made of the reducing electrode of the oxide semiconductor layer.
- the oxide semiconductor layer is reduced to a conductor. Moreover, since the reduced oxide semiconductor layer is transparent and does not absorb visible light region wavelengths, the lower electrode of the electroluminescent element thus obtained can be used as an electrode of a light emitting part for bottom emission. Is possible.
- the conventional ITO layer is not required as a transparent electrode in the electroluminescence element, and the pattern of the semiconductor layer of the transistor And the lower electrode of the electroluminescence element and the upper electrode of the capacitor portion can be formed simultaneously with one photomask, so that one photomask can be reduced as compared with the prior art.
- a part of the oxide semiconductor layer is reduced to be a conductor and used as a transparent electrode, whereby the number of manufacturing steps can be reduced.
- a method for manufacturing an electroluminescent substrate includes a step of forming an oxide semiconductor layer over a gate insulating film, the oxide semiconductor layer, a semiconductor layer of a transistor, and a lower portion of an electroluminescent element. Patterning a pattern corresponding to the electrode and the upper electrode of the capacitor portion; and an opening for exposing the pattern of the lower electrode and the portion corresponding to the upper electrode to the upper layer of the pattern of the oxide semiconductor layer A step of forming a protective film, and using the protective film as a mask, the pattern of the oxide semiconductor layer of the pattern corresponding to the lower electrode of the electroluminescence element and the upper electrode of the capacitor portion is reduced.
- a lower portion of the electroluminescence element comprising a reduction electrode of the oxide semiconductor layer It is a method and a step of forming an upper electrode of the electrode and the capacitor unit.
- the electroluminescent substrate capable of reducing the number of manufacturing steps and the number of masks compared to the conventional method and the manufacturing method thereofcan be provided.
- the gate electrode of the transistor includes a transparent conductive layer and a metal layer, and the transparent conductive layer of the gate electrode and the lower electrode of the capacitor portion are formed of the same material on the same plane. It is preferable.
- the gate electrode of the transistor and the lower electrode of the capacitor unit can be simultaneously patterned using the same mask.
- the lower electrode and the upper electrode of the capacitor unit are both made of transparent electrodes, so that light is transmitted through the capacitor unit.
- the upper electrode of the said capacitor part can be used as a pixel electrode of a light emission part. Therefore, the light emitting part can be formed on the capacitor part by forming the light emitting layer and the electrode facing the upper electrode of the capacitor part via the light emitting layer on the upper electrode of the capacitor part. it can. For this reason, according to said structure, an aperture ratio can be improved also by bottom emission, reducing both the number of processes and the number of masks conventionally.
- the method for manufacturing the electroluminescent substrate includes a step of laminating a transparent conductive layer and a metal layer in this order on the substrate before the step of forming the oxide semiconductor layer on the gate insulating film. Then, a photoresist is formed on the metal layer, half-tone exposure is performed, and the transistor gate electrode formation region and the capacitor portion lower electrode formation region are arranged in the transistor portion lower electrode formation region than the capacitor portion lower electrode formation region. After forming a photoresist pattern having a larger thickness in the gate electrode formation region, ashing and etching are performed to form a gate electrode composed of the transparent conductive layer and the metal electrode layer, and the transparent conductive layer. A step of forming a lower electrode of the capacitor portion, and on the substrate, under the gate electrode and the capacitor portion. It is preferable that a step of forming a gate insulating film so as to cover the electrodes.
- the gate electrode of the transistor and the lower electrode of the capacitor portion can be simultaneously patterned using the same mask.
- the electroluminescence substrate is preferably provided with an electrode made of the same material as the upper electrode of the electroluminescence element on the upper electrode of the capacitor portion via a light emitting layer.
- the method for manufacturing the electroluminescent substrate includes a step of forming a light emitting layer on the lower electrode of the electroluminescent element and the upper electrode of the capacitor unit, and laminating a transparent conductive film on the light emitting layer.
- a transparent conductive film By patterning the transparent conductive film, an electrode pattern facing the lower electrode of the electroluminescent element is formed through the light emitting layer as the upper electrode of the electroluminescent element, and the electrode pattern is formed through the light emitting layer. It is preferable to further include a step of forming an electrode pattern facing the upper electrode of the capacitor unit.
- a light emitting part can be formed on the capacitor part simultaneously using the same material as the electroluminescent element, so that the number of steps and the number of masks can be reduced as compared with the prior art, and the aperture ratio can be reduced by bottom emission. Can be improved.
- the electroluminescence substrate may be formed of a metal layer in which the gate electrode of the transistor and the lower electrode of the capacitor portion are formed of the same material on the same plane.
- the method for manufacturing the electroluminescent substrate includes a step of forming a metal layer on the substrate before the step of forming the oxide semiconductor layer on the gate insulating film, and the step of forming the metal layer on the gate electrode of the transistor. And patterning the pattern corresponding to the lower electrode of the capacitor portion, and forming a gate insulating film on the substrate so as to cover the gate electrode and the lower electrode of the capacitor portion. Good.
- the bottom emission type is used.
- the manufacturing process of the electroluminescent substrate can be further simplified.
- the lower electrode of the electroluminescence element is preferably formed integrally with a semiconductor layer of a transistor connected to the electroluminescence element.
- the transistor has a top contact structure in which a source electrode and a drain electrode are provided on the semiconductor layer, and the electroluminescence element is formed on an upper surface end of the lower electrode of the electroluminescence element.
- One of the source electrode and the drain electrode of the transistor connected to is preferably in contact.
- the pattern corresponding to the lower electrode of the electroluminescent element is formed on the semiconductor layer of the transistor connected to the electroluminescent element. And forming one of the source electrode and the drain electrode of the transistor connected to the electroluminescence element before the step of forming the protective film, and integrally forming with the corresponding pattern. It is preferable that a step of forming the pattern so as to cover an end portion of the pattern corresponding to the lower electrode of the electroluminescence element is provided.
- the pattern corresponding to the lower electrode of the electroluminescent element exposed from the protective film is reduced without any special design, and the upper surface end of the lower electrode of the electroluminescent element is connected to the electroluminescent element.
- a structure in which one of the source electrode and the drain electrode of the transistor to be in contact with each other can be obtained.
- the electrical connection between the lower electrode of the electroluminescent element and the source and drain electrodes provided in contact with the semiconductor layer of the transistor connected to the electroluminescent element is easy. Can be secured.
- the source electrode and the drain electrode are formed on the pattern corresponding to the semiconductor layer of the transistor among the patterns of the oxide semiconductor layer.
- a step of patterning may be provided so that one of the source electrode and the drain electrode is in contact with the upper end of the pattern corresponding to the lower electrode of the electroluminescence element.
- the electroluminescence substrate has a bottom contact structure in which the transistor is provided on the gate insulating film so as to cover the source electrode and the drain electrode, and the lower electrode of the electroluminescence element is formed on the gate electrode. It is preferable that one of the source electrode and the drain electrode of the transistor connected to the electroluminescent element is in contact with the side surface of the electrode.
- the method for manufacturing an electroluminescent substrate includes a step of patterning a source electrode and a drain electrode on the gate insulating film before the step of forming an oxide semiconductor layer on the gate insulating film.
- the oxide semiconductor layer is formed on the gate insulating film so as to cover the source electrode and the drain electrode, and the oxide semiconductor layer is patterned.
- the pattern corresponding to the lower electrode of the electroluminescent element is formed integrally with the pattern corresponding to the semiconductor layer of the transistor connected to the electroluminescent element, and in the step of forming the protective film, The part corresponding to the lower electrode of the electroluminescent element in the protective film The protective film is formed so that the end of the opening exposing the pattern is located on the end of the source electrode and the drain electrode that are electrically connected to the lower electrode of the electroluminescent element. It is preferable.
- the reduced region of the oxide semiconductor layer (that is, the reduced oxide semiconductor layer) can be brought into sufficient and reliable contact with the source electrode or the drain electrode.
- the electroluminescence display panel and the electroluminescence display device include the electroluminescence substrate according to one embodiment of the present invention, and thus have a bottom emission type as described above. Even in this case, the number of manufacturing steps and the number of masks can be reduced as compared with the conventional case.
- the present invention relates to an electroluminescence substrate, an electroluminescence display panel, and an electroluminescence display device including an organic or inorganic electroluminescence element, a capacitor section, and a transistor electrically connected to each of the electroluminescence element and the capacitor section. And can be used in the manufacturing method thereof.
- Organic EL display panel (electroluminescence display panel) 2 pixels 10 element substrate (electroluminescence substrate) DESCRIPTION OF SYMBOLS 11 Insulating substrate 12 Transparent conductive layer 13 Metal layer 14 Gate insulating film 15 Oxide semiconductor layer 15 'Reduced oxide semiconductor layer 16 Metal layer 17 Protective film 17a / 17b Opening 18 Conductive layer 20/30 TFT 21/31 Gate electrode 21a / 31a Transparent conductive layer 21b / 31b Metal layer 22/32 Semiconductor layer 23/33 Source electrode 24/34 Drain electrode 40 Cs part (capacitor part) 41 Lower electrode 42 Upper electrode 50 Organic EL element (electroluminescence element) 51 Pixel electrode (lower electrode of electroluminescence element) 52 Organic EL layer (light emitting layer) 53 Counter electrode (upper electrode and electrode of electroluminescence element) 61 Gate Line 62 Source Line 63 Drive Power Supply Line 70 Counter Substrate 81 Sealing Material 82 Filling Material 83 Electric Wiring Terminal 100 Organic EL Display Device (Electrolum
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
また、このとき、第4のフォトマスクを用いて半導体層304およびn+シリコン層306をパターン化することで、半導体層304からなる半導体膜304aおよびn+シリコン層306からなる不純物半導体膜306a・306bを形成する。
以下、本発明の実施の形態について、詳細に説明する。
本実施の形態について図1の(a)~(d)ないし図8の(a)・(b)に基づいて説明すれば以下の通りである。
図2は、本実施の形態にかかる有機EL表示装置100の要部の概略構成を示す断面図である。
図1の(a)は、本実施の形態にかかる素子基板10における一画素の概略構成を示す平面図であり、図1の(b)は、図1の(a)に示す素子基板10のA1-A1線矢視断面図であり、図1の(c)は、図1の(a)に示す素子基板10のB1-B1線矢視断面図であり、図1の(d)は、図1の(a)に示す素子基板10のC1-C1線矢視断面図である。なお、図1の(a)では、図示の便宜上、一部の構成要素の図示を省略している。また、図3は、図1の(a)~(d)に示す素子基板10における一画素の等価回路図である。
まず、素子基板10の平面構成並びに電気的接続について、主に図1の(a)並びに図3を参照して説明する。
TFT20は、ゲート電極21、ゲート絶縁膜14(第1の絶縁膜、図1の(b)~(d)参照)、半導体層22、ソース電極23、およびドレイン電極24等を備えている。
TFT30は、ゲート電極31、ゲート絶縁膜14、半導体層32、ソース電極33、およびドレイン電極34等を備えている。
Cs部40の下部電極41(第1の容量電極)と上記上部電極42とは、ゲート絶縁膜14を介して重畳配置されている。Cs部40は、下部電極41と上部電極42との間で電荷を蓄積することで容量を形成している。該容量は、TFT30のゲート電極31に印加される電圧を保持するために設けられている。
有機EL素子50は、低電圧直流駆動による高輝度発光が可能な発光素子であり、図1の(b)に示すように、画素電極51(第1の電極、有機EL素子の下部電極、陽極)、有機EL層52、対向電極53(第2の電極、有機EL素子の上部電極、陰極)が、この順に積層されている。
次に、上記素子基板10の断面構成(層構成)について説明する。
対向基板70としては、一般的には、透光性を有するガラス基板やプラスチック基板等が用いられる。該対向基板70の一例としては、例えば、無アルカリガラス基板等の透明な絶縁基板が挙げられるが、金属板等の不透明材料を用いても構わない。
シール材81および充填材82としては、EL表示装置に用いられる公知のシール材および充填材を用いることができる。
次に、本実施の形態にかかる有機EL表示パネル1の製造方法について説明する。但し、以下の説明に記載されている各構成要素の厚みや材料等は、あくまで一実施形態に過ぎず、これらによって発明の範囲が限定解釈されるべきではない。
まず、図4の(a)に示すように、ガラス基板等の絶縁基板11上に、透明導電層12、金属層13(ゲートメタル層、第1の金属層)をこの順にベタ状に積層する。
次いで、図5の(b)に示すように、上記金属層13および透明導電層12を覆うようにゲート絶縁膜14(第1の絶縁層)を積層する。
次いで、上記ゲート絶縁膜14上に、酸化物半導体層15を堆積させる。なお、本実施の形態では、酸化物半導体層15として、スパッタ装置にて、a-InGaZnOx層を、50nmの厚みで堆積させた。
その後、上記ゲート絶縁膜14上に、上記TFT20・30の半導体パターンを覆うように、金属層16(ソースメタル層、第2の金属層)を堆積させた後、図示しない第4のフォトマスクを用いたフォトリソグラフィおよびドライエッチングにより、図5の(d)に示すように、上記金属層16を、所望のパターンに加工する。これにより、上記金属層16からなる、ソース電極23・33、ドレイン電極24・34、ソース線62、および駆動電源線63を形成するとともに、上記開口部14aでソース電極23がCs部40の下部電極41に接続されたTFT20を形成する。
その後、保護膜17(第2の絶縁層)を基板全面に堆積させた後、第5のフォトマスクを用いて、図6の(a)に示すように、該保護膜17に開口部17a・17bを形成する。これにより、有機EL素子50の画素電極形成領域およびCs部40の上部電極形成領域における酸化物半導体層15の表面を露出させる。
次いで、図6の(b)に示すように、保護膜17越しに水素プラズマ処理を行って、ソース電極33および保護膜17で覆われていない酸化物半導体層15を還元する。これにより、還元された酸化物半導体層15である還元酸化物半導体層15’が得られる。
次いで、上記開口部17a・17b内に、有機EL層52を形成する。有機EL層52の形成方法としては、インクジェット法を用いてもよく、マスクを用いて、スパッタ法もしくは真空蒸着法等により形成してもよい。なお、有機EL層52の形成方法そのものは、一般的な有機EL表示装置における有機EL層の製造方法と同様の方法を適用することができる。
次に、上記絶縁基板11上に、導電層18を積層し、図示しない第6のフォトマスクを用いて、上記導電層18が、有機EL層52を介して、有機EL素子50の画素電極51およびCs部40の上部電極42と重畳するとともに、TFT20・30を覆うようにパターン加工することにより、図1の(m)に示すように、対向電極53を形成する。
その後、必要に応じて、上記対向電極53を覆うように封止膜を形成した後、このようにして得られた素子基板10を、シール材81を介して対向基板70と貼り合わせる。なお、充填材82は、素子基板10と対向電極53とを貼り合わせる前に、何れかの基板に塗布してもよく、素子基板10と対向電極53とを注入口を除いて貼り合わせた後、該注入口から注入してもよい。
ここで、比較図を用いて本発明の効果を説明する。
本実施の形態について図9の(a)~(d)ないし図11の(a)~(d)に基づいて説明すれば、以下の通りである。
以下に、本実施の形態にかかる有機EL表示パネル1の製造方法について、図10の(a)~(e)および図11の(a)~(d)を参照して以下に説明する。但し、以下の説明でも、各構成要素の厚みや材料等は、あくまで一実施形態に過ぎず、これらによって発明の範囲が限定解釈されるべきではない。
まず、図10の(a)に示すように、ガラス基板等の絶縁基板11上に、金属層13(ゲートメタル層、第1の金属層)をベタ状に積層する。
本実施の形態によれば、Cs部40の下部電極41をゲートメタルで形成したことで、Cs部40を光が透過しないことから、図9の(b)・(d)に示すように、Cs部40に発光部を設けていない。言い換えれば、Cs部40の上部電極42上に有機EL層52および対向電極53を設けていない。このため、実施の形態1のように従来よりも開口率を向上させることはできず、開口率自体は従来と同じになる。
本実施の形態について図12の(a)~(d)ないし図16の(a)・(b)に基づいて説明すれば、以下の通りである。
以下に、本実施の形態にかかる有機EL表示パネル1の製造方法について、図13の(a)~(e)ないし図15の(a)~(d)を参照して以下に説明する。但し、以下の説明でも、各構成要素の厚みや材料等は、あくまで一実施形態に過ぎず、これらによって発明の範囲が限定解釈されるべきではない。
本実施の形態において、図13の(a)~(e)および図14の(a)・(b)に示す工程は、図4の(a)~(e)および図5の(a)・(b)に示す工程と同じである。したがって、ここでは、その説明を省略する。
次いで、上記ゲート絶縁膜14上に、上記金属層16を覆うように、酸化物半導体層15を堆積させる。なお、本実施の形態でも、酸化物半導体層15として、実施の形態1と同じく、スパッタ装置にて、a-InGaZnOx層を、50nmの厚みで堆積させた。
その後、保護膜17を基板全面に堆積させた後、第5のフォトマスクを用いて、図15の(a)に示すように、該保護膜17に開口部17a・17bを形成する。このとき、本実施の形態では、保護膜17の開口部17aを、平面視で、該開口部17aの端部がソース電極33の端部上に位置するように形成する。これにより、有機EL素子50の画素電極形成領域およびCs部40の上部電極形成領域における酸化物半導体層15の表面を露出させる。
次いで、図15の(b)に示すように、保護膜17越しに、保護膜17で覆われていない酸化物半導体層15を還元する。これにより、還元された酸化物半導体層15である還元酸化物半導体層15’が得られる。
以上の工程により、TFT20・30が、ゲート絶縁膜14上に、ソース電極23・33およびドレイン電極24・34を覆うように酸化物半導体層15が設けられたボトムコンタクト構造を有し、有機EL素子50の画素電極51がソース電極33の側面に接して設けられた有機EL表示パネル1が作製される。
以下に、実施の形態1~3の変形例について説明する。
なお、上記実施の形態1~3では、有機EL素子50の画素電極パターンをTFT30の半導体パターンの延設部として形成する場合を例に挙げて説明した。
実施の形態1~3では、酸化物半導体層15の還元に水素プラズマ処理を用いた場合を例に挙げて説明したが、酸化物半導体層15の還元方法としては、これに限定されるものではない。水素プラズマ処理以外にも、例えば、酸化物半導体層15に水素イオンまたはボロンイオンをドーピングする方法を用いることができる。
実施の形態1~3では、EL素子として、有機EL素子を例に挙げて説明した。
本発明の一態様にかかるエレクトロルミネッセンス基板は、以上のように、ゲート絶縁膜上に、トランジスタの半導体層と、エレクトロルミネッセンス素子の下部電極と、キャパシタ部の上部電極とが設けられ、上記半導体層、上記下部電極、および上記上部電極の上層に保護層が設けられ、上記保護層は、上記下部電極と上記上部電極とを露出する開口部を有し、上記半導体層が酸化物半導体層であり、上記下部電極と上記上部電極とが、上記ゲート絶縁膜上に形成された酸化物半導体層を還元してなる、酸化物半導体層の還元電極である構成を有している。
2 画素
10 素子基板(エレクトロルミネッセンス基板)
11 絶縁基板
12 透明導電層
13 金属層
14 ゲート絶縁膜
15 酸化物半導体層
15’ 還元酸化物半導体層
16 金属層
17 保護膜
17a・17b 開口部
18 導電層
20・30 TFT
21・31 ゲート電極
21a・31a 透明導電層
21b・31b 金属層
22・32 半導体層
23・33 ソース電極
24・34 ドレイン電極
40 Cs部(キャパシタ部)
41 下部電極
42 上部電極
50 有機EL素子(エレクトロルミネッセンス素子)
51 画素電極(エレクトロルミネッセンス素子の下部電極)
52 有機EL層(発光層)
53 対向電極(エレクトロルミネッセンス素子の上部電極、電極)
61 ゲート線
62 ソース線
63 駆動電源線
70 対向基板
81 シール材
82 充填材
83 電気配線端子
100 有機EL表示装置(エレクトロルミネッセンス装置)
101 画素部
102 回路部
103 接続端子
201a・201b レジストパターン
211 半導体層
212 画素電極
Claims (16)
- ゲート絶縁膜上に、トランジスタの半導体層と、エレクトロルミネッセンス素子の下部電極と、キャパシタ部の上部電極とが設けられ、
上記半導体層、上記下部電極、および上記上部電極の上層に保護層が設けられ、
上記保護層は、上記下部電極と上記上部電極とを露出する開口部を有し、
上記半導体層が酸化物半導体層であり、
上記下部電極と上記上部電極とが、上記ゲート絶縁膜上に形成された酸化物半導体層を還元してなる、酸化物半導体層の還元電極であることを特徴とするエレクトロルミネッセンス基板。 - 上記トランジスタのゲート電極が、透明導電層と金属層とを備え、
上記ゲート電極の透明導電層とキャパシタ部の下部電極とが、同一平面に同一の材料で形成されていることを特徴とする請求項1に記載のエレクトロルミネッセンス基板。 - 上記キャパシタ部の上部電極上に、発光層を介して、上記エレクトロルミネッセンス素子の上部電極と同じ材料からなる電極が設けられていることを特徴とする請求項2に記載のエレクトロルミネッセンス基板。
- 上記トランジスタのゲート電極および上記キャパシタ部の下部電極が、同一平面に同一の材料で形成された金属層からなることを特徴とする請求項1に記載のエレクトロルミネッセンス基板。
- 上記エレクトロルミネッセンス素子の下部電極は、上記エレクトロルミネッセンス素子に接続されるトランジスタの半導体層と一体的に形成されていることを特徴とする請求項1~4の何れか1項に記載のエレクトロルミネッセンス基板。
- 上記トランジスタが、上記半導体層上にソース電極およびドレイン電極が設けられたトップコンタクト構造を有し、上記エレクトロルミネッセンス素子の下部電極の上面端部に、上記エレクトロルミネッセンス素子に接続されるトランジスタのソース電極およびドレイン電極のうち一方の電極が接していることを特徴とする請求項1~5の何れか1項に記載のエレクトロルミネッセンス基板。
- 上記トランジスタが、上記ゲート絶縁膜上に、ソース電極およびドレイン電極を覆うように上記半導体層が設けられたボトムコンタクト構造を有し、上記エレクトロルミネッセンス素子の下部電極が、上記エレクトロルミネッセンス素子に接続されるトランジスタのソース電極およびドレイン電極のうち一方の電極の側面に接していることを特徴とする請求項1~5の何れか1項に記載のエレクトロルミネッセンス基板。
- 請求項1~7の何れか1項に記載のエレクトロルミネッセンス基板を備えていることを特徴とするエレクトロルミネッセンス表示パネル。
- 請求項1~7の何れか1項に記載のエレクトロルミネッセンス基板を備えていることを特徴とするエレクトロルミネッセンス表示装置。
- ゲート絶縁膜上に酸化物半導体層を形成する工程と、
上記酸化物半導体層を、トランジスタの半導体層と、エレクトロルミネッセンス素子の下部電極と、キャパシタ部の上部電極とに対応したパターンにパターン化する工程と、
上記酸化物半導体層のパターンの上層に、上記下部電極および上記上部電極に対応する部分のパターンを露出させる開口部を有する保護膜を形成する工程と、
上記保護膜をマスクとして、上記酸化物半導体層のパターンのうち、上記エレクトロルミネッセンス素子の下部電極および上記キャパシタ部の上部電極に対応する部分のパターンを還元して、上記酸化物半導体層の還元電極からなる上記エレクトロルミネッセンス素子の下部電極とキャパシタ部の上部電極とを形成する工程とを備えていることを特徴とするエレクトロルミネッセンス基板の製造方法。 - 上記ゲート絶縁膜上に酸化物半導体層を形成する工程の前に、
基板上に透明導電層と金属層とをこの順に積層する工程と、
上記金属層上にフォトレジストを形成し、ハーフトーン露光を行って、トランジスタのゲート電極の形成領域とキャパシタ部の下部電極の形成領域とに、キャパシタ部の下部電極の形成領域よりもトランジスタのゲート電極の形成領域の方が厚みが大きいフォトレジストのパターンを形成した後、アッシングおよびエッチングを行うことで、上記透明導電層と金属電極層とからなるゲート電極を形成するとともに、上記透明導電層からなる、キャパシタ部の下部電極を形成する工程と、
上記基板上に、上記ゲート電極および上記キャパシタ部の下部電極を覆うようにゲート絶縁膜を形成する工程とを備えていることを特徴とする請求項10に記載のエレクトロルミネッセンス基板の製造方法。 - 上記エレクトロルミネッセンス素子の下部電極および上記キャパシタ部の上部電極上に発光層を形成する工程と、
上記発光層上に透明導電膜を積層し、該透明導電膜をパターン化することにより、上記エレクトロルミネッセンス素子の上部電極として、上記発光層を介して上記エレクトロルミネッセンス素子の下部電極に対向する電極パターンを形成するとともに、上記発光層を介して上記キャパシタ部の上部電極に対向する電極パターンを形成する工程とをさらに備えていることを特徴とする請求項11に記載のエレクトロルミネッセンス基板の製造方法。 - 上記ゲート絶縁膜上に酸化物半導体層を形成する工程の前に、
基板上に金属層を形成する工程と、
上記金属層を、トランジスタのゲート電極と、キャパシタ部の下部電極とに対応したパターンにパターン化する工程と、
上記基板上に、上記ゲート電極および上記キャパシタ部の下部電極を覆うようにゲート絶縁膜を形成する工程とを備えていることを特徴とする請求項10に記載のエレクトロルミネッセンス基板の製造方法。 - 上記酸化物半導体層をパターン化する工程では、上記エレクトロルミネッセンス素子の下部電極に対応するパターンを、上記エレクトロルミネッセンス素子に接続されるトランジスタの半導体層に対応するパターンと一体的に形成するとともに、
上記保護膜を形成する工程の前に、
上記エレクトロルミネッセンス素子に接続されるトランジスタのソース電極およびドレイン電極のうち一方の電極を、上記酸化物半導体層のパターンのうち、上記エレクトロルミネッセンス素子の下部電極に対応する部分のパターンの端部を覆うように形成する工程を備えていることを特徴とする請求項10~13の何れか1項に記載のエレクトロルミネッセンス基板の製造方法。 - 上記保護膜を形成する工程の前に、
上記酸化物半導体層のパターンのうち、上記トランジスタの半導体層に対応するパターン上に、ソース電極およびドレイン電極を、該ソース電極およびドレイン電極のうち一方の電極が、上記エレクトロルミネッセンス素子の下部電極に対応する部分のパターンの上面端部に接するようにパターン形成する工程を備えていることを特徴とする請求項10~13の何れか1項に記載のエレクトロルミネッセンス基板の製造方法。 - 上記ゲート絶縁膜上に酸化物半導体層を形成する工程の前に、
上記ゲート絶縁膜上に、ソース電極およびドレイン電極をパターン形成する工程を備え、
上記ゲート絶縁膜上に酸化物半導体層を形成する工程では、上記ソース電極およびドレイン電極を覆うように上記ゲート絶縁膜上に上記酸化物半導体層を形成し、
上記酸化物半導体層をパターン化する工程では、上記エレクトロルミネッセンス素子の下部電極に対応するパターンを、上記エレクトロルミネッセンス素子に接続されるトランジスタの半導体層に対応するパターンと一体的に形成し、
上記保護膜を形成する工程では、平面視で、上記保護膜における、上記エレクトロルミネッセンス素子の下部電極に対応する部分のパターンを露出させる開口部の端部が、上記ソース電極およびドレイン電極のうち上記エレクトロルミネッセンス素子の下部電極に電気的に接続される電極の端部上に位置するように上記保護膜を形成することを特徴とする請求項10~13の何れか1項に記載のエレクトロルミネッセンス基板の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380056374.9A CN104769658B (zh) | 2012-10-31 | 2013-10-24 | 电致发光基板及其制造方法、电致发光显示面板、电致发光显示装置 |
EP13851766.9A EP2916310B1 (en) | 2012-10-31 | 2013-10-24 | Electroluminescent substrate, method for producing same and electroluminescent display panel |
JP2014544455A JP6005755B2 (ja) | 2012-10-31 | 2013-10-24 | エレクトロルミネッセンス基板およびその製造方法、エレクトロルミネッセンス表示パネル、エレクトロルミネッセンス表示装置 |
US14/439,638 US9679954B2 (en) | 2012-10-31 | 2013-10-24 | Electroluminescent substrate, method for producing same, electroluminescent display panel, and electroluminescent display device |
KR1020157011817A KR101682320B1 (ko) | 2012-10-31 | 2013-10-24 | 일렉트로루미네센스 기판 및 그 제조 방법, 일렉트로루미네센스 표시 패널, 일렉트로루미네센스 표시 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-240776 | 2012-10-31 | ||
JP2012240776 | 2012-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014069316A1 true WO2014069316A1 (ja) | 2014-05-08 |
Family
ID=50627225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/078769 WO2014069316A1 (ja) | 2012-10-31 | 2013-10-24 | エレクトロルミネッセンス基板およびその製造方法、エレクトロルミネッセンス表示パネル、エレクトロルミネッセンス表示装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US9679954B2 (ja) |
EP (1) | EP2916310B1 (ja) |
JP (1) | JP6005755B2 (ja) |
KR (1) | KR101682320B1 (ja) |
CN (1) | CN104769658B (ja) |
MY (1) | MY168565A (ja) |
WO (1) | WO2014069316A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016042638A1 (ja) * | 2014-09-18 | 2016-03-24 | パイオニア株式会社 | 発光装置 |
FR3032066A1 (fr) * | 2015-01-28 | 2016-07-29 | Astron Fiamm Safety | Diode electroluminescente organique comprenant une couche d'injection d'electrons |
WO2018033817A1 (ja) * | 2016-08-17 | 2018-02-22 | 株式会社半導体エネルギー研究所 | 表示装置および電子機器 |
WO2023175794A1 (ja) * | 2022-03-16 | 2023-09-21 | シャープディスプレイテクノロジー株式会社 | 表示装置及びその製造方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102346675B1 (ko) * | 2014-10-31 | 2022-01-04 | 삼성디스플레이 주식회사 | 디스플레이 장치 및 그 제조 방법 |
KR102522595B1 (ko) | 2016-04-29 | 2023-04-17 | 삼성디스플레이 주식회사 | 트랜지스터 패널 및 그 제조 방법 |
CN106653772B (zh) * | 2016-12-30 | 2019-10-01 | 惠科股份有限公司 | 一种显示面板及制程 |
WO2020044439A1 (ja) * | 2018-08-28 | 2020-03-05 | シャープ株式会社 | 表示装置 |
CN109524419A (zh) * | 2018-10-11 | 2019-03-26 | 深圳市华星光电技术有限公司 | Tft阵列基板的制作方法 |
CN110718467B (zh) * | 2019-09-24 | 2021-12-03 | Tcl华星光电技术有限公司 | 一种tft阵列基板的制作方法 |
KR102752245B1 (ko) * | 2019-12-31 | 2025-01-10 | 엘지디스플레이 주식회사 | 전계발광 표시장치 및 그의 제조방법 |
US11296163B2 (en) * | 2020-05-27 | 2022-04-05 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | OLED display panel and OLED display device |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008040343A (ja) * | 2006-08-09 | 2008-02-21 | Nec Corp | 薄膜トランジスタアレイ、その製造方法及び液晶表示装置 |
JP2008176262A (ja) * | 2006-03-20 | 2008-07-31 | Canon Inc | 光制御装置および画像表示装置 |
JP2010123748A (ja) * | 2008-11-19 | 2010-06-03 | Toshiba Corp | 薄膜トランジスタ、その製造方法、表示装置及びその製造方法 |
JP2010282807A (ja) | 2009-06-04 | 2010-12-16 | Casio Computer Co Ltd | 発光パネル |
WO2011010415A1 (ja) * | 2009-07-24 | 2011-01-27 | シャープ株式会社 | 薄膜トランジスタ基板の製造方法 |
JP2011091279A (ja) * | 2009-10-23 | 2011-05-06 | Canon Inc | 薄膜トランジスタの製造方法 |
WO2011132351A1 (ja) * | 2010-04-21 | 2011-10-27 | シャープ株式会社 | 半導体素子、半導体素子の製造方法、アクティブマトリクス基板及び表示装置 |
WO2011148537A1 (ja) * | 2010-05-24 | 2011-12-01 | シャープ株式会社 | 薄膜トランジスタ基板及びその製造方法 |
WO2012053161A1 (ja) * | 2010-10-18 | 2012-04-26 | シャープ株式会社 | 薄膜トランジスタ基板の製造方法およびその方法により製造された薄膜トランジスタ基板 |
WO2012073942A1 (ja) * | 2010-12-01 | 2012-06-07 | シャープ株式会社 | 半導体装置およびその製造方法 |
JP2012208151A (ja) * | 2011-03-29 | 2012-10-25 | Sony Corp | 表示装置および電子機器 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0774358A (ja) * | 1993-06-30 | 1995-03-17 | Fujitsu Ltd | ペロブスカイト系酸化膜の形成方法およびペロブスカイト系酸化膜を用いた薄膜トランジスタとその製造方法 |
EP1710842B1 (en) * | 1999-03-15 | 2008-11-12 | Matsushita Electric Industrial Co., Ltd. | Method for fabricating a bipolar transistor and a MISFET semiconductor device |
JP4415653B2 (ja) * | 2003-11-19 | 2010-02-17 | セイコーエプソン株式会社 | 薄膜トランジスタの製造方法 |
KR101102133B1 (ko) * | 2004-10-27 | 2012-01-02 | 삼성전자주식회사 | 박막 트랜지스터의 제조방법 및 그 방법에 의해서 제조되는 박막 트랜지스터를 포함하는 표시소자 |
JP2008129314A (ja) * | 2006-11-21 | 2008-06-05 | Hitachi Displays Ltd | 画像表示装置およびその製造方法 |
JP5305630B2 (ja) * | 2006-12-05 | 2013-10-02 | キヤノン株式会社 | ボトムゲート型薄膜トランジスタの製造方法及び表示装置の製造方法 |
KR101410926B1 (ko) * | 2007-02-16 | 2014-06-24 | 삼성전자주식회사 | 박막 트랜지스터 및 그 제조방법 |
JP2010028280A (ja) | 2008-07-16 | 2010-02-04 | Tokyo Univ Of Science | 受信装置及びガードインターバル除去方法 |
JP4844617B2 (ja) * | 2008-11-05 | 2011-12-28 | ソニー株式会社 | 薄膜トランジスタ基板および表示装置 |
JP5663231B2 (ja) * | 2009-08-07 | 2015-02-04 | 株式会社半導体エネルギー研究所 | 発光装置 |
KR101714026B1 (ko) * | 2010-07-02 | 2017-03-09 | 삼성디스플레이 주식회사 | 유기 발광 디스플레이 장치 및 그 제조 방법 |
KR101372852B1 (ko) * | 2010-10-05 | 2014-03-10 | 삼성디스플레이 주식회사 | 유기 발광 표시 장치 및 그 제조 방법 |
-
2013
- 2013-10-24 KR KR1020157011817A patent/KR101682320B1/ko not_active Expired - Fee Related
- 2013-10-24 US US14/439,638 patent/US9679954B2/en active Active
- 2013-10-24 MY MYPI2015001104A patent/MY168565A/en unknown
- 2013-10-24 EP EP13851766.9A patent/EP2916310B1/en not_active Not-in-force
- 2013-10-24 JP JP2014544455A patent/JP6005755B2/ja active Active
- 2013-10-24 WO PCT/JP2013/078769 patent/WO2014069316A1/ja active Application Filing
- 2013-10-24 CN CN201380056374.9A patent/CN104769658B/zh active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008176262A (ja) * | 2006-03-20 | 2008-07-31 | Canon Inc | 光制御装置および画像表示装置 |
JP2008040343A (ja) * | 2006-08-09 | 2008-02-21 | Nec Corp | 薄膜トランジスタアレイ、その製造方法及び液晶表示装置 |
JP2010123748A (ja) * | 2008-11-19 | 2010-06-03 | Toshiba Corp | 薄膜トランジスタ、その製造方法、表示装置及びその製造方法 |
JP2010282807A (ja) | 2009-06-04 | 2010-12-16 | Casio Computer Co Ltd | 発光パネル |
WO2011010415A1 (ja) * | 2009-07-24 | 2011-01-27 | シャープ株式会社 | 薄膜トランジスタ基板の製造方法 |
JP2011091279A (ja) * | 2009-10-23 | 2011-05-06 | Canon Inc | 薄膜トランジスタの製造方法 |
WO2011132351A1 (ja) * | 2010-04-21 | 2011-10-27 | シャープ株式会社 | 半導体素子、半導体素子の製造方法、アクティブマトリクス基板及び表示装置 |
WO2011148537A1 (ja) * | 2010-05-24 | 2011-12-01 | シャープ株式会社 | 薄膜トランジスタ基板及びその製造方法 |
WO2012053161A1 (ja) * | 2010-10-18 | 2012-04-26 | シャープ株式会社 | 薄膜トランジスタ基板の製造方法およびその方法により製造された薄膜トランジスタ基板 |
WO2012073942A1 (ja) * | 2010-12-01 | 2012-06-07 | シャープ株式会社 | 半導体装置およびその製造方法 |
JP2012208151A (ja) * | 2011-03-29 | 2012-10-25 | Sony Corp | 表示装置および電子機器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2916310A4 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016042638A1 (ja) * | 2014-09-18 | 2016-03-24 | パイオニア株式会社 | 発光装置 |
JPWO2016042638A1 (ja) * | 2014-09-18 | 2017-06-15 | パイオニア株式会社 | 発光装置 |
FR3032066A1 (fr) * | 2015-01-28 | 2016-07-29 | Astron Fiamm Safety | Diode electroluminescente organique comprenant une couche d'injection d'electrons |
WO2018033817A1 (ja) * | 2016-08-17 | 2018-02-22 | 株式会社半導体エネルギー研究所 | 表示装置および電子機器 |
JPWO2018033817A1 (ja) * | 2016-08-17 | 2019-08-15 | 株式会社半導体エネルギー研究所 | 表示装置および電子機器 |
US10642110B2 (en) | 2016-08-17 | 2020-05-05 | Semiconductor Energy Laboratory Co., Ltd. | Display device and electronic appliance |
US11086175B2 (en) | 2016-08-17 | 2021-08-10 | Semiconductor Energy Laboratory Co., Ltd. | Display device and electronic appliance |
JP2021185411A (ja) * | 2016-08-17 | 2021-12-09 | 株式会社半導体エネルギー研究所 | 表示装置 |
WO2023175794A1 (ja) * | 2022-03-16 | 2023-09-21 | シャープディスプレイテクノロジー株式会社 | 表示装置及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP2916310B1 (en) | 2017-05-31 |
EP2916310A4 (en) | 2015-11-18 |
CN104769658A (zh) | 2015-07-08 |
US20150279916A1 (en) | 2015-10-01 |
EP2916310A1 (en) | 2015-09-09 |
JPWO2014069316A1 (ja) | 2016-09-08 |
MY168565A (en) | 2018-11-13 |
KR101682320B1 (ko) | 2016-12-05 |
US9679954B2 (en) | 2017-06-13 |
CN104769658B (zh) | 2017-03-08 |
KR20150067307A (ko) | 2015-06-17 |
JP6005755B2 (ja) | 2016-10-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6005755B2 (ja) | エレクトロルミネッセンス基板およびその製造方法、エレクトロルミネッセンス表示パネル、エレクトロルミネッセンス表示装置 | |
US11818924B2 (en) | Flexible organic electroluminescent device and method for fabricating the same | |
KR102790423B1 (ko) | 유기발광 다이오드 표시장치 및 그 제조방법 | |
JP6874167B2 (ja) | Oled表示パネル及びその製造方法 | |
US9312319B2 (en) | Organic light emitting diode device and method for fabricating the same | |
KR102315094B1 (ko) | 고 개구율 유기발광 다이오드 표시장치 및 그 제조방법 | |
CN102969456B (zh) | 有机发光显示装置及其制造方法 | |
KR102075530B1 (ko) | 박막트랜지스터 어레이 기판 및 그 제조방법, 및 이를 포함하는 표시장치 | |
US9219104B2 (en) | Self-emissive display and manufacturing method thereof | |
CN110085603A (zh) | 显示面板及制作方法 | |
JP2021013021A (ja) | ディスプレイ装置 | |
KR20170082174A (ko) | 대면적 미러 표시 장치 및 이의 제조 방법 | |
KR20150072117A (ko) | 유기발광다이오드 표시장치 및 이의 제조방법 | |
KR102132444B1 (ko) | 유기발광다이오드 표시장치의 제조방법 | |
TWI621258B (zh) | 用於顯示設備的基板、包含該基板的顯示設備及製造該顯示設備的方法 | |
JP2001100655A (ja) | El表示装置 | |
US8269412B2 (en) | Organic electroluminescent display device and method of fabricating the same | |
US11616082B2 (en) | Display apparatus | |
KR20150034462A (ko) | 고 개구율 유기발광 다이오드 표시장치 및 그 제조 방법 | |
KR102092550B1 (ko) | 유기전계 발광소자 및 이의 제조 방법 | |
KR102109661B1 (ko) | 유기발광다이오드 표시장치의 제조방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13851766 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2014544455 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14439638 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20157011817 Country of ref document: KR Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2013851766 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2013851766 Country of ref document: EP |