CN104779254A - 薄膜晶体管阵列面板及其制造方法 - Google Patents
薄膜晶体管阵列面板及其制造方法 Download PDFInfo
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- CN104779254A CN104779254A CN201410850991.2A CN201410850991A CN104779254A CN 104779254 A CN104779254 A CN 104779254A CN 201410850991 A CN201410850991 A CN 201410850991A CN 104779254 A CN104779254 A CN 104779254A
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- 239000010409 thin film Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000002161 passivation Methods 0.000 claims abstract description 64
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 239000002184 metal Substances 0.000 claims abstract description 56
- 239000004065 semiconductor Substances 0.000 claims abstract description 51
- 229910021332 silicide Inorganic materials 0.000 claims abstract description 31
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 19
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 34
- 229910000077 silane Inorganic materials 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 30
- 239000010949 copper Substances 0.000 claims description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
- 229910044991 metal oxide Inorganic materials 0.000 claims description 17
- 150000004706 metal oxides Chemical class 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 15
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 12
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 11
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 11
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052733 gallium Inorganic materials 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 6
- 238000005229 chemical vapour deposition Methods 0.000 claims description 5
- 239000012212 insulator Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims 4
- JYMITAMFTJDTAE-UHFFFAOYSA-N aluminum zinc oxygen(2-) Chemical compound [O-2].[Al+3].[Zn+2] JYMITAMFTJDTAE-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 226
- 229920002120 photoresistant polymer Polymers 0.000 description 18
- 150000002739 metals Chemical class 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 229910052814 silicon oxide Inorganic materials 0.000 description 11
- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910052738 indium Inorganic materials 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical class [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000004380 ashing Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 229910052735 hafnium Inorganic materials 0.000 description 2
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 229910001362 Ta alloys Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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- H10D30/6704—Thin-film transistors [TFT] having supplementary regions or layers in the thin films or in the insulated bulk substrates for controlling properties of the device
- H10D30/6713—Thin-film transistors [TFT] having supplementary regions or layers in the thin films or in the insulated bulk substrates for controlling properties of the device characterised by the properties of the source or drain regions, e.g. compositions or sectional shapes
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- H01L21/34—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies not provided for in groups H01L21/18, H10D48/04 and H10D48/07, with or without impurities, e.g. doping materials
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- H01L21/76841—Barrier, adhesion or liner layers
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- 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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- 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
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- 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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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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Abstract
本发明提供一种薄膜晶体管阵列面板及其制造方法。栅极电极设置在基板上。半导体层设置在栅极电极上。栅极绝缘层设置在栅极电极和半导体层之间。源极电极设置在半导体层的第一侧,并具有第一侧表面。漏极电极设置在半导体层的第二侧,并具有第二侧表面。第一和第二侧表面限定重叠栅极电极的间隔。金属硅化物层设置在第一和第二侧表面上。钝化层设置在金属硅化物层、源极电极和漏极电极上。钝化层不与第一和第二侧表面接触。
Description
技术领域
本发明涉及薄膜晶体管阵列面板及其制造方法。
背景技术
显示器诸如液晶显示器(LCD)、有机发光二极管(OLED)显示器等包括多对电场产生电极和插置在其间的电光有源层。液晶显示器包括作为电光有源层的液晶层,有机发光二极管显示器包括作为电光有源层的有机发光层。
场产生电极连接到开关元件以接收电信号,电光有源层将电信号转变成光信号以显示图像。这样的开关元件包括薄膜晶体管。薄膜晶体管包括传送控制薄膜晶体管的扫描信号的栅极线和传送被施加到像素电极的信号的数据线。
随着显示装置的显示区域变大,需要信号更快地传播通过显示区域。
发明内容
根据本发明的一示例性实施方式,一种薄膜晶体管阵列面板被提供如下。栅极电极设置在基板上。半导体层设置在栅极电极上。栅极绝缘层设置在栅极电极和半导体层之间。源极电极设置在半导体层的第一侧,并具有第一侧表面。漏极电极设置在半导体层的第二侧,并具有第二侧表面。第一和第二侧表面限定重叠栅极电极的间隔。金属硅化物层设置在第一和第二侧表面上。钝化层设置在金属硅化物层、源极电极和漏极电极上。
根据本发明的一示例性实施方式,一种制造薄膜晶体管阵列面板的方法被提供如下。在基板上形成栅极电极。在基板和栅极电极上形成半导体层。在栅极电极和半导体层之间形成栅极绝缘层。在半导体层的第一和第二侧设置源极电极和漏极电极。源极电极和漏极电极包括金属元素。在源极电极和漏极电极上形成硅烷(SiH4)材料层。在源极电极和漏极电极上形成钝化层。钝化层的形成导致硅化工艺。硅化工艺包括在硅烷(SiH4)材料层的硅与源极电极和漏极电极的金属元素之间的反应,由此分别在源极电极和漏极电极的第一和第二侧表面上形成金属硅化物层。第一和第二侧表面限定重叠栅极电极的间隔。第一和第二侧表面与金属硅化物层接触。
附图说明
本发明的这些和其它特征将通过参考附图描述其示例性实施方式而变得更加明显,在图中:
图1是根据本发明示例性实施方式的薄膜晶体管阵列面板的俯视平面图;
图2是沿着图1的线II-II截取的截面图;
图3至图10是显示根据本发明示例性实施方式的薄膜晶体管阵列面板的制造方法的截面图;
图11是根据本发明示例性实施方式的液晶显示器的截面图;
图12是在根据本发明示例性实施方式的薄膜晶体管阵列面板中主布线层和钝化层之间的界面的图像;
图13是根据本发明示例性实施方式的薄膜晶体管阵列面板的沿着图1的线II-II截取的截面图;
图14至图20是显示根据本发明示例性实施方式的薄膜晶体管阵列面板的制造方法的截面图;以及
图21是在根据本发明示例性实施方式的薄膜晶体管阵列面板中主布线层和钝化层之间的界面的图像。
具体实施方式
以下将参考附图详细描述本发明的示例性实施方式。然而,本发明可以以不同的形式实施并且不应被理解为限于此处阐明的实施方式。在图中,为了清晰,可以夸大层和区域的厚度。还将理解,当一元件被称为“在”另一元件或基板“上”时,它可以直接在所述另一元件或基板上,或者也可以存在居间元件。还将理解,当一元件被称为“联接到”或“连接到”另一元件时,它可以直接联接到或连接到所述另一元件,或者也可以存在居间元件。相同的附图标记可以在整个说明书和附图中指代相同的元件。
图1是根据本发明示例性实施方式的薄膜晶体管阵列面板的俯视平面图。图2是沿着图1的线II-II截取的截面图。
参考图1和图2,薄膜晶体管阵列面板100包括形成在由透明玻璃或塑料形成的绝缘基板110上的栅极线121。
栅极线121传送栅极信号并且在横向方向上延伸。每条栅极线121包括从栅极线121伸出的栅极电极124。
栅极线121和栅极电极124可具有双层结构,该双层结构具有第一层121p和124p以及第二层121q和124q。第一层121p和124p以及第二层121q和124q的每个可以由铝基金属诸如铝(Al)和铝合金、银基金属诸如银(Ag)和银合金、铜基金属诸如铜(Cu)和铜合金、钼基金属诸如钼(Mo)和钼合金、铬(Cr)、钛(Ti)、钽(Ta)、锰(Mn)等形成。例如,第一层121p和124p可以包括钛,第二层121q和124q可以包括铜或铜合金。
备选地,第一层121p和124p以及第二层121q和124q可以由具有不同物理特性的膜的组合形成。栅极线121和栅极电极124包括两层,但是不限于此,并且可以形成为单层或三层。
由绝缘材料诸如硅氧化物或硅氮化物形成的栅极绝缘层140位于栅极线121上。栅极绝缘层140可以包括第一绝缘层140a和第二绝缘层140b。第一绝缘层140a可以由具有大约的厚度的硅氮化物(SiNx)形成,第二绝缘层140b可以由具有大约的厚度的硅氧化物(SiOx)形成。备选地,第一绝缘层140a可以由硅氮氧化物(SiON)形成,第二绝缘层140b可以由硅氧化物(SiOx)形成。栅极绝缘层140包括两层,但是可以包括单层。
半导体层151形成在栅极绝缘层140上。半导体层151可以由非晶硅、晶体硅或氧化物半导体形成。半导体层151主要在竖直方向上延伸并且包括朝向栅极电极124突出的突出部154。
当半导体层151由氧化物半导体形成时,半导体层151包含锌(Zn)、铟(In)、锡(Sn)、镓(Ga)和铪(Hf)中的至少一种。例如,半导体层151可以包含铟镓锌氧化物。
数据线171、连接到数据线171的源极电极173以及漏极电极175形成在半导体层151和栅极绝缘层140上。
数据线171传送数据信号并且主要在竖直方向上延伸以交叉栅极线121。源极电极173可以从数据线171延伸。源极电极173可以重叠栅极电极124。源极电极173可以基本上是U形。
漏极电极175与数据线171分离并且从源极电极173的“U”形的中心向上延伸。
数据线171、源极电极173和漏极电极175具有阻挡层171p、173p和175p以及主布线层171q、173q和175q的双膜结构。阻挡层171p、173p和175p由金属氧化物形成,主布线层171q、173q和175q由铜或铜合金形成。
例如,阻挡层171p、173p和175p可以由铟锌氧化物、镓锌氧化物和铝锌氧化物之一形成。
阻挡层171p、173p和175p用于防止诸如铜等的材料扩散到半导体层151。
金属硅化物层177位于主布线层171q、173q和175q上。金属硅化物层177包括铜、硅和氧,例如,可以包括由CuSixOy表示的化合物。金属硅化物层177,其覆盖源极电极173和漏极电极175,与源极电极173和漏极电极175的表面接触。例如,金属硅化物层177覆盖源极电极173和漏极电极175的暴露的侧表面A和B以及源极电极173和漏极电极175的暴露的上表面。金属硅化物层177不与栅极绝缘层140接触。
在下文中,将描述源极电极173和漏极电极175的靠近半导体层151的沟道区的暴露的侧表面A。
参考图2,半导体层151的突出部154包括没有被数据线171、源极电极173和漏极电极175覆盖的部分。例如,突出部154的该部分在源极电极173和漏极电极175之间暴露。数据线171、源极电极173和漏极电极175层叠在半导体层151上。半导体层151中的突出部154的该部分在源极电极173和漏极电极175之间暴露。半导体层151的边缘与数据线171和漏极电极175的外边缘竖直对准。源极电极173和漏极电极175的内边缘限定突出部154的暴露部分。数据线171、源极电极173和漏极电极175的边缘可以竖直地倾斜。
一个栅极电极124、一个源极电极173和一个漏极电极175与氧化物半导体层151的突出部154一起形成一个薄膜晶体管(TFT),该薄膜晶体管的沟道形成在源极电极173和漏极电极175之间的突出部154中。
源极电极173和漏极电极175的邻近沟道区的侧表面被暴露,源极电极173和漏极电极175的暴露的侧表面A被金属硅化物层177覆盖。如果源极电极173和漏极电极175的侧表面A被暴露而没有金属硅化物层177,如果执行形成包括硅氧化物的钝化层的后续工艺或者执行向半导体层151的突出部154提供沟道特性的热处理,则主布线层171q、173q和175q中包括的材料诸如铜形成多孔氧化物,从而可能降低薄膜晶体管特性。因此,金属硅化物层可以防止诸如铜等的材料在执行诸如形成钝化层的后续工艺期间以及执行热处理期间被氧化。
金属硅化物层177可以使用包括形成硅烷材料层以及利用硅烷材料层执行硅化工艺的两步骤工艺来形成。随后将参考图8-10进行详细的描述。
钝化层180形成在金属硅化物层177上。钝化层180由无机绝缘体诸如硅氮化物或硅氧化物、有机绝缘体或低介电绝缘体形成。
钝化层180可以包括下钝化层180a和上钝化层180b。下钝化层180a可以由硅氧化物形成,上钝化层180b可以由硅氮化物形成。因为半导体层151包括氧化物半导体,所以邻近半导体层151的下钝化层180a由硅氧化物形成。在下钝化层180a由硅氮化物形成时,半导体层151不用作薄膜晶体管的沟道区。
钝化层180在源极电极173和漏极电极175之间可以与突出部154的没有被源极电极173和漏极电极175覆盖的暴露部分接触。
暴露漏极电极175的一个端部的接触孔185形成在钝化层180上。
像素电极191形成在钝化层180上。像素电极191经由接触孔185与漏极电极175物理地连接和电连接,并且被施加来自漏极电极175的数据电压。
像素电极191可以由透明导体诸如ITO(铟锡氧化物)或IZO(铟锌氧化物)形成。
图3至图10是示出用于制造根据本发明示例性实施方式的薄膜晶体管阵列面板的方法的截面图。图3至图10顺序示出沿着图1的线II-II截取的截面图。
参考图3,钼基金属诸如钼(Mo)和钼合金、铬基金属诸如铬(Cr)和铬合金、钛基金属诸如钛(Ti)和钛合金、钽基金属诸如钽(Ta)和钽合金、以及锰基金属诸如锰(Mn)和锰合金中的至少一种沉积在由透明玻璃或塑料形成的绝缘基板110上,从铝基金属诸如铝和铝合金、银基金属诸如银(Ag)和银合金、铜基金属诸如铜(Cu)和铜合金中选出的其中之一沉积在其上以形成两层并将其图案化,由此形成包括栅极电极124的栅极线121。例如,第一层121p和124p可以包含钛,第二层121q和124q可以包含铜或铜合金。
例如,在形成两层之后,光致抗蚀剂(未示出)被沉积并且被图案化,其后,第一层121p和124p以及第二层121q和124q通过利用图案化的光致抗蚀剂(未示出)作为掩模而被一起蚀刻。在此情形下,作为蚀刻剂,可采用能够蚀刻第一层121p和124p以及第二层121q和124q二者的一种。
参考图4,栅极绝缘层140、氧化物层150、金属氧化物层170p和金属层170q沉积在栅极线121和栅极电极124上。在栅极绝缘层140的形成期间,可以沉积包含硅氮化物的第一绝缘层140a,然后可以沉积包含硅氧化物的第二绝缘层140b。
氧化物层150可以包含锌(Zn)、铟(In)、锡(Sn)、镓(Ga)和铪(Hf)中的至少一种,金属氧化物层170p可以包含铟锌氧化物、镓锌氧化物和铝锌氧化物中的一种,金属层170q可以包含铜或铜合金。
光致抗蚀剂被形成并且被图案化以在金属层170q上形成第一光致抗蚀剂图案50。第一光致抗蚀剂图案50具有厚的第一区50a和相对薄的第二区50b。第一光致抗蚀剂图案50的厚度差异可以通过用掩模控制照射的光的量或者通过使用回流(reflow)方法而形成。在控制光的量时,狭缝图案、栅格图案或半透明层可以形成在掩模上。薄的第二区50b相应于将形成薄膜晶体管的沟道区的位置。
参考图5,金属氧化物层170p和金属层170q通过利用可以蚀刻金属氧化物层170p和金属层170q二者的蚀刻剂,通过利用第一光致抗蚀剂图案50作为掩模而被蚀刻。此处使用的蚀刻剂可以与在蚀刻栅极线121的第一层121p和124p以及第二层121q和124q时使用的蚀刻剂相同。
如果金属氧化物层170p和金属层170q被蚀刻,则金属氧化物层170p和金属层170q的被第一光致抗蚀剂图案50覆盖的侧表面也被蚀刻剂蚀刻,结果,第一金属层170p和第二金属层170q的边界线位于形成第一光致抗蚀剂图案50的区域A1、B1和C1内侧。
在此情形下,蚀刻金属氧化物层170p和金属层170q的蚀刻剂不蚀刻栅极绝缘层140和氧化层150。
另外,氧化层150通过利用第一光致抗蚀剂图案50作为掩模而被蚀刻。
参考图6,图5中的薄的第二区50b通过回蚀工艺被去除。在此情形下,第一区50a也被蚀刻,因而宽度和高度减小而变成图6的第二光致抗蚀剂图案51。第二光致抗蚀剂图案51形成在比图5中形成第一光致抗蚀剂图案50的区域B1和C1小的区域B2和C2中。
参考图7,金属氧化物层170p和金属层170q通过利用第二光致抗蚀剂图案51作为掩模被蚀刻剂蚀刻。
在此情形下,金属氧化物层170p和金属层170q被图案化以形成具有两层结构的数据线171p和171q、源极电极173p和173q以及漏极电极175p和175q。此外,氧化物半导体层151包括突出部154。突出部154可以用作薄膜晶体管的沟道区。
利用具有不同厚度的光致抗蚀剂图案,形成半导体层151和突出部154以及数据线171、源极电极173和漏极电极175的阻挡层171p、173p和175p以及主布线层171q、173q和175q。因为半导体层151和突出部154、数据线171、源极电极173和漏极电极175利用光致抗蚀剂图案作为蚀刻掩模而形成,所以它们的边缘竖直对准。
接着,参考图8,在光致抗蚀剂图案通过灰化工艺被去除之后,源极电极173和漏极电极175受到硅烷(SiH4)处理以形成硅烷材料层176。硅烷(SiH4)处理可以通过化学气相沉积(CVD)工艺来执行。
参考图9,硅烷材料层176沿着源极电极173和漏极电极175的用硅烷(SiH4)处理的表面形成。此时,源极电极173和漏极电极175的接近位于源极电极173和漏极电极175之间的沟道区的每个侧表面被暴露,硅烷材料层176形成在源极电极和漏极电极的暴露的侧表面上。例如,源极电极和漏极电极的暴露的侧表面被硅烷材料层176覆盖。
硅烷材料层176形成为覆盖沟道区和栅极绝缘层140以及源极电极173和漏极电极175的表面。
参考图10,钝化层180形成在硅烷材料层176上。在形成钝化层180期间,包含硅氮化物的下钝化层180a可以形成在硅烷材料层176上,包含硅氮化物的上钝化层180b可以形成在下钝化层180a上。包括硅氧化物(SiOx)的下钝化层180a可以通过例如SiH4和NO2的反应形成。在下钝化层180a的工艺中,硅烷材料层176可以与主布线层171q、173q和175q的铜或铜合金反应,由此形成金属硅化物层177。这里,硅烷材料层176可以在硅烷材料层176与由铜或铜合金形成的主布线层171q、173q和175q接触的位置处,被选择性地转变成金属硅化物层177。
通过图案化钝化层180形成暴露漏极电极175的一部分的接触孔185,像素电极191形成在钝化层180上以形成图2的薄膜晶体管阵列面板。在此情形下,像素电极191形成为经由接触孔185与漏极电极175物理地连接和电连接。
图11是示出根据本发明示例性实施方式的薄膜晶体管阵列面板的截面图。
参考图11,第二基板210面对绝缘基板110。第二基板210可以是由透明玻璃或塑料形成的绝缘基板。光阻挡构件220形成在第二基板210上。光阻挡构件220可以由黑矩阵形成并且用于防止光泄漏。
滤色器230也形成在第二基板210和光阻挡构件220上。滤色器230设置在由光阻挡构件220围绕的区域中,并且可以沿着一列像素电极191延长。每个滤色器230可以表现三原色诸如红色、绿色和蓝色中的一种。然而,所表现的颜色不限于红色、绿色和蓝色的三原色,每个滤色器230可以表现青色、品红色、黄色或基于白色的颜色中的一种。
光阻挡构件220和滤色器230形成在如上所述的相对的阵列面板200上,然而光阻挡构件220和滤色器230的至少之一可以形成在薄膜晶体管阵列面板100上。
外涂层250形成在滤色器230和光阻挡构件220上。外涂层250可以由绝缘材料形成。外涂层250可以密封滤色器230,并且还可以提供平坦的表面。备选地,外涂层250可以被省略。
公共电极270形成在外涂层250上。
施加有数据电压的像素电极191与施加有公共电压的公共电极270一起产生电场,以确定在两个电极之间的液晶层3的液晶分子31的方向。像素电极191和公共电极270组成电容器,从而即使在薄膜晶体管被截止之后,仍保持所施加的电压。
像素电极191与存储电极线(未示出)重叠以组成存储电容器,结果,可以增加液晶电容器的电压存储能力。
薄膜晶体管阵列面板100的描述可以适用于参考图2描述的示例性实施方式的内容。
根据示例性实施方式的薄膜晶体管阵列面板不限于液晶显示器,而是可以被应用于其它显示系统诸如有机发光显示装置。
图12是在根据本发明示例性实施方式的薄膜晶体管阵列面板中主布线层和钝化层之间的界面的图像。
图12是根据本发明示例性实施方式的薄膜晶体管阵列面板的电子显微镜图像。参考图12,金属硅化物层177被均匀地形成在主布线层173q和下钝化层180a之间的界面处。此外,没有形成污染源诸如铜氧化物。
图13是根据本发明示例性实施方式的薄膜晶体管阵列面板的沿着图1的线II-II截取的截面图。图13的截面结构基本上类似于图2的截面结构,除了源极电极173和漏极电极175之外。在下文中,将描述与图2的示例性实施方式的差异。
参考图13,数据线171、源极电极173和漏极电极175还包括形成在主布线层171q、173q和175q上的盖层171r、173r和175r。盖层171r、173r和175r包括金属氧化物。例如,盖层171r、173r和175r可以由铟锌氧化物、镓锌氧化物、铝锌氧化物和镓锌氧化物中的至少一种形成。例如,金属硅化物层177仅形成在主布线层171q、173q和175q的侧表面处。主布线层171q、173q和175q的侧表面没有被阻挡层171p、173p和175p以及盖层171r、173r和175r覆盖。例如,主布线层171q、173q和175q的侧表面被暴露在阻挡层171p、173p和175p与盖层171r、173r和175r之间。
除了所描述的差异之外,图2中描述的内容可以全部被应用于图13的本示例性实施方式。
图14至图20是显示根据本发明示例性实施方式的薄膜晶体管阵列面板的制造方法的截面图。图14至图20顺序显示沿着图1的线II-II截取的截面图。
参考图14至图19,根据本发明示例性实施方式的薄膜晶体管阵列面板的制造方法基本上类似于图4至图9中描述的示例性实施方式。参考图14,金属氧化物层170r可以另外地形成在金属层170q上。在后续工艺中,金属氧化物层170r与下面的金属层170q和金属氧化物层170p一起被图案化,如图17所示,由此盖层171r、173r和175r形成在主布线层171q、173q和175q上。
参考图18,在光致抗蚀剂图案通过灰化工艺被去除之后,源极电极173和漏极电极175的表面受到硅烷(SiH4)处理以形成硅烷材料层176。硅烷(SiH4)处理可以通过化学气相沉积(CVD)方法来执行。
参考图19,硅烷材料层176沿着源极电极173和漏极电极175的用硅烷(SiH4)处理的表面形成。此时,在源极电极173和漏极电极175的接近位于源极电极173和漏极电极175之间的沟道区的每个侧表面当中,硅烷材料层176形成为覆盖阻挡层171p、173p和175p与盖层171r、173r和175r之间的主布线层171q、173q和175q的暴露的侧表面。硅烷材料层176形成为覆盖沟道区和栅极绝缘层140以及源极电极173和漏极电极175的表面。
参考图20,钝化层180形成在硅烷材料层176上。在形成钝化层180期间,包含硅氧化物的下钝化层180a可以形成在硅烷材料层176上,包含硅氮化物的上钝化层180b可以形成在下钝化层180a上。包括硅氧化物(SiOx)的下钝化层180a可以通过硅烷(SiH4)和二氧化氮(NO2)的反应而形成。在形成下钝化层180a期间,硅烷材料层176与主布线层171q、173q和175q彼此反应,由此形成金属硅化物层177。主布线层171q、173q和175q由铜或铜合金形成。在形成下钝化层180a期间,硅烷材料层176的硅可以在硅烷材料层176与源极电极173和漏极电极175之间的界面处与铜或铜合金反应。
暴露漏极电极175的一部分的接触孔185通过图案化钝化层180而形成,像素电极191形成在钝化层180上以形成图13的薄膜晶体管阵列面板。在此情形下,像素电极191形成为经由接触孔185与漏极电极175物理地连接和电连接。
图21是在根据本发明示例性实施方式的薄膜晶体管阵列面板形成之后的电子显微镜图像,参考图21,金属硅化物层177均匀地形成在主布线层173q与下钝化层180a之间的界面处。此外,没有形成污染源诸如铜氧化物。
虽然已经参考本发明的示例性实施方式显示和描述了本发明,但是对于本领域的普通技术人员而言明显的是,其中可以在形式和细节上进行各种改变而不脱离由权利要求所限定的本发明的精神和范围。
Claims (20)
1.一种薄膜晶体管阵列面板,包括:
基板;
栅极电极,设置在所述基板上;
半导体层,设置在所述栅极电极和所述基板上;
栅极绝缘层,设置在所述栅极电极和所述半导体层之间;
源极电极,设置在所述半导体层的第一侧,其中所述源极电极包括第一侧表面;
漏极电极,设置在所述半导体层的第二侧,其中所述漏极电极包括第二侧表面并且与所述源极电极间隔开,其中所述第一侧表面和所述第二侧表面限定重叠所述栅极电极的间隔;
金属硅化物层,设置在所述第一侧表面和所述第二侧表面上;以及
钝化层,设置在所述金属硅化物层、所述源极电极和所述漏极电极上。
2.根据权利要求1所述的薄膜晶体管阵列面板,其中
所述半导体层通过由所述源极电极的所述第一侧表面和所述漏极电极的所述第二侧表面限定的所述间隔而与所述钝化层接触。
3.根据权利要求2所述的薄膜晶体管阵列面板,还包括
连接到所述源极电极的数据线,其中所述数据线的顶表面低于所述源极电极的顶表面,其中所述源极电极包括阻挡层和设置在所述阻挡层上的主布线层,其中所述主布线层包括铜或铜合金,所述阻挡层包括金属氧化物。
4.根据权利要求3所述的薄膜晶体管阵列面板,其中
所述钝化层包括下钝化层和上钝化层,所述下钝化层包括硅氧化物,所述上钝化层包括硅氮化物。
5.根据权利要求3所述的薄膜晶体管阵列面板,其中
所述金属硅化物层包括铜。
6.根据权利要求5所述的薄膜晶体管阵列面板,其中
所述阻挡层包括铟锌氧化物(IZO)、镓锌氧化物(GZO)和铝锌氧化物(AZO)中的至少一种。
7.根据权利要求1所述的薄膜晶体管阵列面板,其中
所述金属硅化物层还设置在所述源极电极和所述漏极电极的上表面上,其中所述源极电极和所述漏极电极的所述上表面不与所述钝化层接触。
8.根据权利要求3所述的薄膜晶体管阵列面板,还包括
设置在所述主布线层的上表面上的盖层,所述盖层包括金属氧化物,其中所述钝化层设置在所述盖层上而不与所述主布线层的所述上表面接触。
9.根据权利要求1所述的薄膜晶体管阵列面板,其中
所述半导体层包括氧化物半导体。
10.根据权利要求3所述的薄膜晶体管阵列面板,其中
所述半导体层包括第三侧表面,所述数据线包括第四侧表面,其中所述第三侧表面和所述第四侧表面彼此竖直地对准,其中所述第三侧表面与所述钝化层接触,所述第四侧表面与所述金属硅化物层接触而不与所述钝化层接触。
11.一种制造薄膜晶体管阵列面板的方法,包括:
在基板上形成栅极电极;
在所述基板和所述栅极电极上形成半导体层;
在所述栅极电极和所述半导体层之间形成栅极绝缘层;
形成分别设置在所述半导体层的第一侧和第二侧的源极电极和漏极电极,其中所述源极电极和所述漏极电极包括金属元素;
在所述源极电极和所述漏极电极上形成硅烷(SiH4)材料层;以及
在所述源极电极和所述漏极电极上形成钝化层,
其中所述钝化层的形成导致硅化工艺,其中所述硅化工艺包括在所述硅烷(SiH4)材料层的硅与所述源极电极和所述漏极电极的所述金属元素之间的反应,由此分别在所述源极电极和所述漏极电极的第一侧表面和第二侧表面上形成金属硅化物层,其中所述第一侧表面和所述第二侧表面限定重叠所述栅极电极的间隔,其中所述第一侧表面和所述第二侧表面与所述金属硅化物层接触。
12.根据权利要求11所述的方法,其中
所述硅烷(SiH4)材料层的形成通过化学气相沉积工艺来执行。
13.根据权利要求12所述的方法,其中
所述钝化层通过SiH4和NO2的反应而形成。
14.根据权利要求13所述的方法,其中
所述钝化层通过由所述源极电极和所述漏极电极的所述第一侧表面和所述第二侧表面限定的所述间隔而与所述半导体层接触。
15.根据权利要求14所述的方法,其中
所述源极电极的形成包括在所述半导体层上形成阻挡层以及在所述阻挡层上形成主布线层,以及
所述主布线层包括铜或铜合金以及所述阻挡层包括金属氧化物。
16.根据权利要求15所述的方法,其中
所述钝化层的形成包括形成下钝化层和形成上钝化层,其中所述下钝化层的形成导致在所述主布线层与所述硅烷(SiH4)材料层之间的界面处发生所述硅化工艺,其中所述下钝化层包括硅氧化物,所述上钝化层包括硅氮化物。
17.根据权利要求16所述的方法,其中
所述金属硅化物层还设置在所述源极电极和所述漏极电极的上表面上,其中所述源极电极和所述漏极电极的所述上表面不与所述钝化层接触。
18.根据权利要求15所述的方法,还包括在所述主布线层的上表面上形成盖层,其中所述主布线层的所述上表面不与所述钝化层接触。
19.根据权利要求11所述的方法,其中
所述半导体层包括氧化物半导体。
20.根据权利要求11所述的方法,其中
所述半导体层的形成以及所述源极电极和所述漏极电极的形成通过使用掩模来执行。
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US10032803B2 (en) | 2018-07-24 |
KR20150083693A (ko) | 2015-07-20 |
US20170053940A1 (en) | 2017-02-23 |
US20150200212A1 (en) | 2015-07-16 |
US9515093B2 (en) | 2016-12-06 |
KR102166898B1 (ko) | 2020-10-19 |
JP2015133479A (ja) | 2015-07-23 |
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