KR101809759B1 - 반도체 소자 및 그 제조 방법 - Google Patents
반도체 소자 및 그 제조 방법 Download PDFInfo
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- KR101809759B1 KR101809759B1 KR1020127006049A KR20127006049A KR101809759B1 KR 101809759 B1 KR101809759 B1 KR 101809759B1 KR 1020127006049 A KR1020127006049 A KR 1020127006049A KR 20127006049 A KR20127006049 A KR 20127006049A KR 101809759 B1 KR101809759 B1 KR 101809759B1
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 314
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims description 84
- 239000010408 film Substances 0.000 claims abstract description 170
- 239000010409 thin film Substances 0.000 claims abstract description 51
- 239000000758 substrate Substances 0.000 claims description 141
- 238000010438 heat treatment Methods 0.000 claims description 69
- 229910052739 hydrogen Inorganic materials 0.000 claims description 64
- 239000001257 hydrogen Substances 0.000 claims description 64
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 61
- 238000004544 sputter deposition Methods 0.000 claims description 44
- 239000012298 atmosphere Substances 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 29
- 229910044991 metal oxide Inorganic materials 0.000 claims description 22
- 150000004706 metal oxides Chemical class 0.000 claims description 22
- 229910007541 Zn O Inorganic materials 0.000 claims description 14
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000011701 zinc Substances 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000011787 zinc oxide Substances 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052733 gallium Inorganic materials 0.000 claims description 5
- 229910052738 indium Inorganic materials 0.000 claims description 5
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 4
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 4
- 239000012535 impurity Substances 0.000 abstract description 84
- 125000004435 hydrogen atom Chemical group [H]* 0.000 abstract description 40
- 230000015572 biosynthetic process Effects 0.000 abstract description 31
- 150000001875 compounds Chemical class 0.000 abstract description 24
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- 239000010410 layer Substances 0.000 description 425
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 41
- 229910052814 silicon oxide Inorganic materials 0.000 description 38
- 230000008569 process Effects 0.000 description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 25
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- 229910052581 Si3N4 Inorganic materials 0.000 description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 18
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 18
- 125000004429 atom Chemical group 0.000 description 17
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- 239000010703 silicon Substances 0.000 description 17
- 239000000463 material Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 15
- 239000011521 glass Substances 0.000 description 15
- 229910052760 oxygen Inorganic materials 0.000 description 15
- 239000001301 oxygen Substances 0.000 description 15
- 229910052754 neon Inorganic materials 0.000 description 14
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 14
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 14
- 239000001307 helium Substances 0.000 description 13
- 229910052734 helium Inorganic materials 0.000 description 13
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 13
- 230000001681 protective effect Effects 0.000 description 13
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- 238000000206 photolithography Methods 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 8
- 239000000956 alloy Substances 0.000 description 7
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- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
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- 239000002184 metal Substances 0.000 description 5
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 238000006356 dehydrogenation reaction Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- -1 for example Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 238000001552 radio frequency sputter deposition Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000003775 Density Functional Theory Methods 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 229910003437 indium oxide Inorganic materials 0.000 description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005546 reactive sputtering Methods 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 239000005407 aluminoborosilicate glass Substances 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005685 electric field effect Effects 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 238000005224 laser annealing Methods 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02565—Oxide semiconducting materials not being Group 12/16 materials, e.g. ternary compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/02631—Physical deposition at reduced pressure, e.g. MBE, sputtering, evaporation
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/031—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT]
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- 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
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- 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
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- 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
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- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thin Film Transistor (AREA)
- Physical Vapour Deposition (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
- Liquid Crystal (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Formation Of Insulating Films (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
Description
도 2의 (a) 내지 (d)는 실시예에 따른 반도체 소자의 제조 공정을 나타내는 도면.
도 3은 실시예에 따른 성막 장치를 나타내는 도면.
도 4는 실시예에 따른 성막 장치를 나타내는 도면.
도 5는 실시예에 따른 성막 장치를 나타내는 도면.
도 6a 및 도 6b는 예 1에 따른 SIMS 분석 결과를 나타내는 도면.
Claims (20)
- 산화물 반도체 소자 제조 방법으로서,
기판 위에 게이트 전극을 형성하는 단계,
상기 게이트 전극 위에 게이트 절연막을 형성하는 단계,
상기 게이트 절연막을 개재하여 상기 게이트 전극 위에 산화물 반도체층을 형성하는 단계,
상기 산화물 반도체층과 접하고 단부들이 상기 게이트 전극과 중첩하는 소스 전극 및 드레인 전극을 형성하는 단계, 및
상기 소스 전극과 상기 드레인 전극 사이의 상기 산화물 반도체층을 덮는 산화물 절연층을 형성하는 단계
를 포함하고,
상기 기판은 감압 상태로 유지된 제1 반응 챔버 내에 보관되고,
상기 기판은 100℃ 이상, 600℃ 이하의 온도로 가열되고,
상기 제1 반응 챔버 내의 잔류 수분을 제거한 상태에서 스퍼터링 가스를 도입하고 상기 제1 반응 챔버 내에 제공된 제1 타겟을 이용하여, 상기 기판 위에 상기 게이트 절연막을 형성하고,
제2 반응 챔버에 제공된 금속 산화물을 제2 타겟으로서 이용하여 상기 게이트 절연막 위에 상기 산화물 반도체층을 형성하는, 산화물 반도체 소자 제조 방법. - 산화물 반도체 소자 제조 방법으로서,
기판 위에 게이트 전극을 형성하는 단계,
상기 게이트 전극 위에 게이트 절연막을 형성하는 단계,
상기 게이트 절연막을 개재하여 상기 게이트 전극 위에 산화물 반도체층을 형성하는 단계,
상기 산화물 반도체층과 접하고 단부들이 상기 게이트 전극과 중첩하는 소스 전극 및 드레인 전극을 형성하는 단계, 및
상기 소스 전극과 상기 드레인 전극 사이의 상기 산화물 반도체층을 덮는 산화물 절연층을 형성하는 단계
를 포함하고,
상기 게이트 절연막이 형성된 기판은 감압 상태로 유지된 가열 챔버 내에 보관되고,
상기 기판은 상기 가열 챔버 내의 잔류 수분을 제거한 상태에서 400℃ 이하의 온도로 예비가열되고,
상기 기판은 감압 상태로 유지된 반응 챔버 내에 보관되고,
상기 기판은 100℃ 이상, 600℃ 이하의 온도로 가열되고,
상기 반응 챔버에 제공된 금속 산화물을 타겟으로서 이용하여 상기 게이트 절연막 위에 상기 산화물 반도체층을 형성하는, 산화물 반도체 소자 제조 방법. - 제1항에 있어서, 상기 스퍼터링 가스의 순도는 99.9999% 이상인, 산화물 반도체 소자 제조 방법.
- 제1항 또는 제2항에 있어서, 잔류 수분은 크라이오펌프(cryopump)를 이용한 배기에 의해 제거되는, 산화물 반도체 소자 제조 방법.
- 제1항에 있어서, 상기 제2 타겟은 주성분으로서 산화 아연을 함유하는 금속 산화물인, 산화물 반도체 소자 제조 방법.
- 제2항에 있어서, 상기 타겟은 주성분으로서 산화 아연을 함유하는 금속 산화물인, 산화물 반도체 소자 제조 방법.
- 제1항에 있어서, 상기 제2 타겟은 인듐, 갈륨, 및 아연을 함유하는 금속 산화물인, 산화물 반도체 소자 제조 방법.
- 제2항에 있어서, 상기 타겟은 인듐, 갈륨, 및 아연을 함유하는 금속 산화물인, 산화물 반도체 소자 제조 방법.
- 제1항 또는 제2항에 있어서, 상기 산화물 반도체층은 상기 게이트 절연막을 형성한 후에 대기에 노출되지 않고 형성되는, 산화물 반도체 소자 제조 방법.
- 삭제
- 박막 트랜지스터로서,
기판 위의 게이트 전극,
상기 게이트 전극 위의 게이트 절연막,
상기 게이트 절연막을 개재하여 상기 게이트 전극 위에 있는 산화물 반도체층,
상기 산화물 반도체층과 접하고 단부들이 상기 게이트 전극과 중첩하는 소스 전극 및 드레인 전극, 및
상기 소스 전극과 상기 드레인 전극 사이에 형성된 상기 산화물 반도체층을 덮는 산화물 절연층
을 포함하고,
상기 산화물 반도체층과 상기 산화물 절연층 사이의 계면의 수소 농도는, 상기 계면으로부터 30 nm 떨어진 상기 산화물 절연층의 일부의 수소 농도의 5배 이상 100배 이하인, 박막 트랜지스터. - 삭제
- 제11항에 있어서, 상기 산화물 반도체층은 아연을 함유하는, 박막 트랜지스터.
- 제11항에 있어서, 상기 산화물 반도체층은 In-Ga-Zn-O계 막인, 박막 트랜지스터.
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
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