JP2024001482A - アクティブマトリクス基板および表示装置 - Google Patents
アクティブマトリクス基板および表示装置 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 150
- 239000011159 matrix material Substances 0.000 title claims abstract description 120
- 239000010410 layer Substances 0.000 claims abstract description 488
- 239000004065 semiconductor Substances 0.000 claims abstract description 108
- 239000011229 interlayer Substances 0.000 claims abstract description 55
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 34
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 29
- 239000010408 film Substances 0.000 claims description 94
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 239000004973 liquid crystal related substance Substances 0.000 claims description 21
- 229910007541 Zn O Inorganic materials 0.000 claims description 20
- 238000009413 insulation Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 16
- 230000002093 peripheral effect Effects 0.000 description 11
- 239000010936 titanium Substances 0.000 description 11
- 238000001312 dry etching Methods 0.000 description 10
- 238000005530 etching Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 229910004298 SiO 2 Inorganic materials 0.000 description 9
- 238000000059 patterning Methods 0.000 description 9
- 239000011701 zinc Substances 0.000 description 9
- 229910004205 SiNX Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 229910052750 molybdenum Inorganic materials 0.000 description 6
- 239000011733 molybdenum Substances 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 229910021417 amorphous silicon Inorganic materials 0.000 description 5
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052738 indium Inorganic materials 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229910052733 gallium Inorganic materials 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 238000001039 wet etching Methods 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 2
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 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
- 239000011787 zinc oxide Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910004286 SiNxOy Inorganic materials 0.000 description 1
- 229910020286 SiOxNy Inorganic materials 0.000 description 1
- 229910020923 Sn-O Inorganic materials 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910003077 Ti−O Inorganic materials 0.000 description 1
- 229910007604 Zn—Sn—O Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002751 molybdenum Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- -1 structures Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 150000003608 titanium Chemical class 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
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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
- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
- G02F1/13685—Top gates
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- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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- H01L27/1248—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/76—Unipolar devices, e.g. field effect transistors
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- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
- H01L29/78633—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device with a light shield
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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
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Abstract
【解決手段】アクティブマトリクス基板は、酸化物半導体層、酸化物半導体層上に設けられたゲート絶縁層およびゲート絶縁層を介して酸化物半導体層に対向するように配置されたゲート電極を有する画素TFTと、複数のゲート配線と、ゲート電極および複数のゲート配線を覆うように設けられた層間絶縁層と、層間絶縁層上に設けられた複数のソース配線と、複数のソース配線を覆うように設けられた上部絶縁層と、上部絶縁層上に設けられた有機絶縁層とを備える。層間絶縁層は、酸化シリコンから形成された第1層と、第1層上に設けられ、窒化シリコンから形成された第2層と、第2層上に設けられ、酸化シリコンから形成された第3層とを含む。
【選択図】図2
Description
マトリクス状に配列された複数の画素領域を有し、
基板と、
前記基板に支持され、前記複数の画素領域のそれぞれに対応して設けられた画素TFTであって、酸化物半導体層、前記酸化物半導体層上に設けられたゲート絶縁層、および、前記ゲート絶縁層を介して前記酸化物半導体層に対向するように配置されたゲート電極を有する画素TFTと、
行方向に延びる複数のゲート配線であって、前記ゲート電極と同じ導電膜から形成された複数のゲート配線と、
前記ゲート電極および前記複数のゲート配線を覆うように設けられた層間絶縁層と、
列方向に延びる複数のソース配線であって、前記層間絶縁層上に設けられた複数のソース配線と、
前記複数のソース配線を覆うように設けられた上部絶縁層と、
前記上部絶縁層上に設けられた有機絶縁層と、
を備えたアクティブマトリクス基板であって、
前記層間絶縁層は、
酸化シリコンから形成された第1層と、
前記第1層上に設けられ、窒化シリコンから形成された第2層と、
前記第2層上に設けられ、酸化シリコンから形成された第3層と、
を含む、アクティブマトリクス基板。
前記層間絶縁層の前記第3層の厚さは、50nm以上である、項目1に記載のアクティブマトリクス基板。
前記上部絶縁層は、
酸化シリコンから形成された第4層と、
前記第4層上に設けられ、窒化シリコンから形成された第5層と、
を含む、項目1または2に記載のアクティブマトリクス基板。
前記上部絶縁層は、
窒化シリコンから形成された第4層と、
前記第4層上に設けられ、酸化シリコンから形成された第5層と、
前記第5層上に設けられ、窒化シリコンから形成された第6層と、
を含む、項目1または2に記載のアクティブマトリクス基板。
前記上部絶縁層は、窒化シリコンから形成された第4層のみを含む、項目1または2に記載のアクティブマトリクス基板。
前記ゲート電極および前記複数のゲート配線を含むゲートメタル層と、
前記複数のソース配線を含むソースメタル層と、
を備え、
前記ゲートメタル層と前記ソースメタル層とが前記層間絶縁層を介して重なっている領域を交差領域と呼ぶとき、
前記有機絶縁層および前記上部絶縁層は、前記有機絶縁層および前記上部絶縁層の両方にわたって形成された開口部であって、前記交差領域に重なる開口部を有する、項目1から5のいずれかに記載のアクティブマトリクス基板。
前記層間絶縁層は、前記開口部に重なる領域において、前記第1層および前記第2層を含み、かつ、前記第3層を含まない部分を有する、項目6に記載のアクティブマトリクス基板。
前記層間絶縁層の前記部分に含まれる前記第2層の厚さは、50nm以上である、項目7に記載のアクティブマトリクス基板。
前記層間絶縁層は、前記開口部に重なる領域全体において、前記第1層、前記第2層および前記第3層を含んでいる、項目6に記載のアクティブマトリクス基板。
前記複数のゲート配線を駆動するゲート配線駆動回路であって、前記基板上にモノリシックに形成されたゲート配線駆動回路をさらに備え、
前記有機絶縁層および前記上部絶縁層が有する前記開口部は、前記ゲート配線駆動回路内に位置している、項目6から9のいずれかに記載のアクティブマトリクス基板。
前記酸化物半導体層は、In-Ga-Zn-O系半導体を含む項目1から10のいずれかに記載のアクティブマトリクス基板。
前記In-Ga-Zn-O系半導体は結晶質部分を含む項目11に記載のアクティブマトリクス基板。
項目1から12のいずれかに記載のアクティブマトリクス基板を備えた表示装置。
前記アクティブマトリクス基板に対向するように配置された対向基板と、
前記アクティブマトリクス基板と前記対向基板との間に設けられた液晶層と、
を備えた液晶表示装置である、項目13に記載の表示装置。
まず、図1を参照しながら、本実施形態におけるアクティブマトリクス基板100の構造の概略を説明する。図1は、アクティブマトリクス基板100の平面構造の一例を示す概略図である。
図5を参照しながら、本実施形態のアクティブマトリクス基板200を説明する。図5は、アクティブマトリクス基板200を模式的に示す断面図である。以下の説明では、アクティブマトリクス基板200が実施形態1におけるアクティブマトリクス基板100と異なる点を中心に説明を行う(以降の実施形態でも同様である)。
図6を参照しながら、本実施形態のアクティブマトリクス基板300を説明する。図6は、アクティブマトリクス基板300を模式的に示す断面図である。
本発明の実施形態によるアクティブマトリクス基板100、200および300は、例えば、液晶表示装置に好適に用いることができる。液晶表示装置の例を図8に示す。
酸化物半導体層4に含まれる酸化物半導体は、アモルファス酸化物半導体であってもよいし、結晶質部分を有する結晶質酸化物半導体であってもよい。結晶質酸化物半導体としては、多結晶酸化物半導体、微結晶酸化物半導体、c軸が層面に概ね垂直に配向した結晶質酸化物半導体などが挙げられる。
Claims (14)
- マトリクス状に配列された複数の画素領域を有し、
基板と、
前記基板に支持され、前記複数の画素領域のそれぞれに対応して設けられた画素TFTであって、酸化物半導体層、前記酸化物半導体層上に設けられたゲート絶縁層、および、前記ゲート絶縁層を介して前記酸化物半導体層に対向するように配置されたゲート電極を有する画素TFTと、
行方向に延びる複数のゲート配線であって、前記ゲート電極と同じ導電膜から形成された複数のゲート配線と、
前記ゲート電極および前記複数のゲート配線を覆うように設けられた層間絶縁層と、
列方向に延びる複数のソース配線であって、前記層間絶縁層上に設けられた複数のソース配線と、
前記複数のソース配線を覆うように設けられた上部絶縁層と、
前記上部絶縁層上に設けられた有機絶縁層と、
を備えたアクティブマトリクス基板であって、
前記層間絶縁層は、
酸化シリコンから形成された第1層と、
前記第1層上に設けられ、窒化シリコンから形成された第2層と、
前記第2層上に設けられ、酸化シリコンから形成された第3層と、
を含む、アクティブマトリクス基板。 - 前記層間絶縁層の前記第3層の厚さは、50nm以上である、請求項1に記載のアクティブマトリクス基板。
- 前記上部絶縁層は、
酸化シリコンから形成された第4層と、
前記第4層上に設けられ、窒化シリコンから形成された第5層と、
を含む、請求項1または2に記載のアクティブマトリクス基板。 - 前記上部絶縁層は、
窒化シリコンから形成された第4層と、
前記第4層上に設けられ、酸化シリコンから形成された第5層と、
前記第5層上に設けられ、窒化シリコンから形成された第6層と、
を含む、請求項1または2に記載のアクティブマトリクス基板。 - 前記上部絶縁層は、窒化シリコンから形成された第4層のみを含む、請求項1または2に記載のアクティブマトリクス基板。
- 前記ゲート電極および前記複数のゲート配線を含むゲートメタル層と、
前記複数のソース配線を含むソースメタル層と、
を備え、
前記ゲートメタル層と前記ソースメタル層とが前記層間絶縁層を介して重なっている領域を交差領域と呼ぶとき、
前記有機絶縁層および前記上部絶縁層は、前記有機絶縁層および前記上部絶縁層の両方にわたって形成された開口部であって、前記交差領域に重なる開口部を有する、請求項1または2に記載のアクティブマトリクス基板。 - 前記層間絶縁層は、前記開口部に重なる領域において、前記第1層および前記第2層を含み、かつ、前記第3層を含まない部分を有する、請求項6に記載のアクティブマトリクス基板。
- 前記層間絶縁層の前記部分に含まれる前記第2層の厚さは、50nm以上である、請求項7に記載のアクティブマトリクス基板。
- 前記層間絶縁層は、前記開口部に重なる領域全体において、前記第1層、前記第2層および前記第3層を含んでいる、請求項6に記載のアクティブマトリクス基板。
- 前記複数のゲート配線を駆動するゲート配線駆動回路であって、前記基板上にモノリシックに形成されたゲート配線駆動回路をさらに備え、
前記有機絶縁層および前記上部絶縁層が有する前記開口部は、前記ゲート配線駆動回路内に位置している、請求項6に記載のアクティブマトリクス基板。 - 前記酸化物半導体層は、In-Ga-Zn-O系半導体を含む請求項1または2に記載のアクティブマトリクス基板。
- 前記In-Ga-Zn-O系半導体は結晶質部分を含む請求項11に記載のアクティブマトリクス基板。
- 請求項1または2に記載のアクティブマトリクス基板を備えた表示装置。
- 前記アクティブマトリクス基板に対向するように配置された対向基板と、
前記アクティブマトリクス基板と前記対向基板との間に設けられた液晶層と、
を備えた液晶表示装置である、請求項13に記載の表示装置。
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