JP7022592B2 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- JP7022592B2 JP7022592B2 JP2018002641A JP2018002641A JP7022592B2 JP 7022592 B2 JP7022592 B2 JP 7022592B2 JP 2018002641 A JP2018002641 A JP 2018002641A JP 2018002641 A JP2018002641 A JP 2018002641A JP 7022592 B2 JP7022592 B2 JP 7022592B2
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- Prior art keywords
- insulating film
- gate electrode
- film
- oxide semiconductor
- drain
- Prior art date
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- 239000010408 film Substances 0.000 claims description 301
- 239000004065 semiconductor Substances 0.000 claims description 126
- 125000006850 spacer group Chemical group 0.000 claims description 87
- 239000011229 interlayer Substances 0.000 claims description 55
- 239000001257 hydrogen Substances 0.000 claims description 44
- 229910052739 hydrogen Inorganic materials 0.000 claims description 44
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 41
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 40
- 239000010409 thin film Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 description 37
- 239000000758 substrate Substances 0.000 description 26
- 239000004973 liquid crystal related substance Substances 0.000 description 20
- 238000001312 dry etching Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 238000005468 ion implantation Methods 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 238000005229 chemical vapour deposition Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 7
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 4
- 238000000137 annealing Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000000059 patterning Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910018575 Al—Ti Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- -1 Zinc Oxide Nitride Chemical class 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910001195 gallium oxide Inorganic materials 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- OWOMRZKBDFBMHP-UHFFFAOYSA-N zinc antimony(3+) oxygen(2-) Chemical compound [O--].[Zn++].[Sb+3] OWOMRZKBDFBMHP-UHFFFAOYSA-N 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
- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 1
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- H01L27/02—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
- H01L27/12—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
- H01L27/1214—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
- H01L27/1222—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, shape or crystalline structure of the active layer
- H01L27/1225—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, shape or crystalline structure of the active layer with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
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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
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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
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
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- H01L27/12—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
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- H01L27/1222—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, shape or crystalline structure of the active layer
- H01L27/1229—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, shape or crystalline structure of the active layer with different crystal properties within a device or between different devices
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- H01L27/1214—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
- 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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- H01L27/12—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
- H01L27/1214—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
- H01L27/1259—Multistep manufacturing methods
- H01L27/127—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42384—Gate electrodes for field effect devices for field-effect transistors with insulated gate for thin film field effect transistors, e.g. characterised by the thickness or the shape of the insulator or the dimensions, the shape or the lay-out of the conductor
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4908—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET for thin film semiconductor, e.g. gate of TFT
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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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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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- 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
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
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- 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
- H01L21/04—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
- 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 H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
- H01L21/42—Bombardment with radiation
- H01L21/423—Bombardment with radiation with high-energy radiation
- H01L21/425—Bombardment with radiation with high-energy radiation producing ion implantation
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- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
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Description
Claims (13)
- 酸化物半導体で構成される薄膜トランジスタ(TFT)を有する画素が複数形成された表示装置であって、
前記酸化物半導体の上にゲート絶縁膜が形成され、
前記ゲート絶縁膜の上にアルミニウム酸化膜が形成され、
前記アルミニウム酸化膜の上にゲート電極が形成され、
前記ゲート電極の両側にサイドスペーサが形成され、
前記ゲート電極、前記サイドスペーサ及びソース及びドレインを覆って層間絶縁膜が形成され、
平面視にて、前記ドレインと前記ソースを結ぶ方向について前記ゲート電極の幅は前記アルミニウム酸化膜の幅よりも狭く形成され、
前記酸化物半導体は、チャネルと、前記チャネルの両側に前記ドレインおよび前記ソースが形成され、前記チャネルと前記ドレインの間、および、前記チャネルと前記ソースの間に中間領域が形成され、
前記酸化物半導体の前記チャネルと前記中間領域の上にゲート絶縁膜が形成され、
前記チャネルの上方で、前記アルミニウム酸化膜の上にゲート電極が形成されており、
前記層間絶縁膜は、前記酸化物半導体の前記ドレインおよび前記ソースと直接接していることを特徴とする表示装置。 - 前記層間絶縁膜において前記ドレインおよび前記ソースと接する部分はSiNで形成されていることを特徴とする請求項1に記載の表示装置。
- 酸化物半導体で構成される薄膜トランジスタ(TFT)を有する画素が複数形成された表示装置であって、
前記酸化物半導体の上にゲート絶縁膜が形成され、
前記ゲート絶縁膜の上にアルミニウム酸化膜が形成され、
前記アルミニウム酸化膜の上にゲート電極が形成され、
前記ゲート電極の両側にサイドスペーサが形成され、
前記ゲート電極、前記サイドスペーサ及びソース及びドレインを覆って層間絶縁膜が形成され、
平面視にて、前記ドレインと前記ソースを結ぶ方向について前記ゲート電極の幅は前記アルミニウム酸化膜の幅よりも狭く形成され、
前記層間絶縁膜の水素含有量は、前記サイドスペーサの水素含有量よりも大きいことを特徴とする表示装置。 - 酸化物半導体で構成される薄膜トランジスタ(TFT)を有する画素が複数形成された表示装置であって、
前記酸化物半導体の上にゲート絶縁膜が形成され、
前記ゲート絶縁膜の上にアルミニウム酸化膜が形成され、
前記アルミニウム酸化膜の上にゲート電極が形成され、
前記ゲート電極の両側にサイドスペーサが形成され、
前記ゲート電極、前記サイドスペーサ及びソース及びドレインを覆って層間絶縁膜が形成され、
平面視にて、前記ドレインと前記ソースを結ぶ方向について前記ゲート電極の幅は前記アルミニウム酸化膜の幅よりも狭く形成され、
前記酸化物半導体は、チャネルと、前記チャネルの両側に前記ドレインおよび前記ソースが形成され、前記チャネルと前記ドレインの間、および、前記チャネルと前記ソースの間に中間領域が形成され、
前記酸化物半導体の前記チャネルと前記中間領域の上にゲート絶縁膜が形成され、
前記チャネルの上方で、前記アルミニウム酸化膜の上にゲート電極が形成されおり、
前記酸化物半導体における水素含有量は、前記チャネル<前記中間領域<ドレインおよびソースの順であることを特徴とする表示装置。 - 酸化物半導体で構成される薄膜トランジスタ(TFT)を有する画素が複数形成された表示装置であって、
前記酸化物半導体の上にゲート絶縁膜が形成され、
前記ゲート絶縁膜の上にアルミニウム酸化膜が形成され、
前記アルミニウム酸化膜の上にゲート電極が形成され、
前記ゲート電極の両側にサイドスペーサが形成され、
前記ゲート電極、前記サイドスペーサ及びソース及びドレインを覆って層間絶縁膜が形成され、
平面視にて、前記ドレインと前記ソースを結ぶ方向について前記ゲート電極の幅は前記アルミニウム酸化膜の幅よりも狭く形成され、
前記酸化物半導体はチャネルを有し、前記チャネルはチャネル長とチャネル幅を持ち、前記サイドスペーサの前記アルミニウム酸化膜と接する側を底部とし、前記サイドスペーサの前記底部と反対側を上部としたとき、前記底部の前記チャネル長方向の長さは、前記上部の前記チャネル長方向の長さよりも大きく、
前記底部の前記チャネル長方向の長さは、前記上部の前記チャネル長方向の長さはよりも0.3μm以上大きいことを特徴とする表示装置。 - 酸化物半導体で構成される薄膜トランジスタ(TFT)を有する画素が複数形成された表示装置であって、
前記酸化物半導体の上にゲート絶縁膜が形成され、
前記ゲート絶縁膜の上にアルミニウム酸化膜が形成され、
前記アルミニウム酸化膜の上にゲート電極が形成され、
前記ゲート電極の両側にサイドスペーサが形成され、
前記ゲート電極、前記サイドスペーサ及びソース及びドレインを覆って層間絶縁膜が形成され、
平面視にて、前記ドレインと前記ソースを結ぶ方向について前記ゲート電極の幅は前記アルミニウム酸化膜の幅よりも狭く形成され、
前記サイドスペーサの高さは100nm乃至500nmであることを特徴とする表示装置。 - 酸化物半導体で構成される薄膜トランジスタ(TFT)を有する画素が複数形成された表示装置であって、
前記酸化物半導体の上にゲート絶縁膜が形成され、
前記ゲート絶縁膜の上にアルミニウム酸化膜が形成され、
前記アルミニウム酸化膜の上にゲート電極が形成され、
前記ゲート電極の両側にサイドスペーサが形成され、
前記ゲート電極、前記サイドスペーサ及びソース及びドレインを覆って層間絶縁膜が形成され、
平面視にて、前記ドレインと前記ソースを結ぶ方向について前記ゲート電極の幅は前記アルミニウム酸化膜の幅よりも狭く形成され、
前記ゲート電極を形成する金属は、前記サイドスペーサの側面を覆い、前記サイドスペーサの上面に延在していることを特徴とする表示装置。 - 酸化物半導体で構成される薄膜トランジスタ(TFT)を有する画素が複数形成された表示装置であって、
前記酸化物半導体の上にゲート絶縁膜が形成され、
前記ゲート絶縁膜の上にアルミニウム酸化膜が形成され、
前記アルミニウム酸化膜の上にゲート電極が形成され、
前記ゲート電極の両側にサイドスペーサが形成され、
前記ゲート電極、前記サイドスペーサ及びソース及びドレインを覆って層間絶縁膜が形成され、
平面視にて、前記ドレインと前記ソースを結ぶ方向について前記ゲート電極の幅は前記アルミニウム酸化膜の幅よりも狭く形成され、
前記ゲート電極を形成する金属が前記サイドスペーサの上面に延在する量は、0.1μm以上であることを特徴とする表示装置。 - 酸化物半導体で構成される薄膜トランジスタ(TFT)を有する画素が複数形成された表示装置であって、
前記酸化物半導体の上にゲート絶縁膜が形成され、
前記ゲート絶縁膜の上にアルミニウム酸化膜が形成され、
前記アルミニウム酸化膜の上にゲート電極が形成され、
前記ゲート電極の両側にサイドスペーサが形成され、
前記ゲート電極、前記サイドスペーサ及びソース及びドレインを覆って層間絶縁膜が形成され、
平面視にて、前記ドレインと前記ソースを結ぶ方向について前記ゲート電極の幅は前記アルミニウム酸化膜の幅よりも狭く形成され、
前記酸化物半導体の前記ドレインおよび前記ソースは前記ゲート絶縁膜によって覆われ、前記層間絶縁膜は前記ゲート絶縁膜と接触していることを特徴とする表示装置。 - 前記層間絶縁膜が前記ゲート絶縁膜と接する部分はSiNで形成されていることを特徴とする請求項9に記載の表示装置。
- 前記層間絶縁膜の水素含有量は、前記サイドスペーサの水素含有量よりも大きいことを特徴とする請求項9に記載の表示装置。
- 前記酸化物半導体は、チャネルを有し、前記チャネルの両側に前記ドレインまたは前記ソースが形成され、前記チャネルと前記ドレインの間、および、前記チャネルと前記ソースの間に中間領域が形成され、
前記酸化物半導体における水素含有量は、前記チャネル<前記中間領域<前記ドレインおよび前記ソースの順であることを特徴とする請求項9に記載の表示装置。 - チャネルはチャネル長とチャネル幅を持ち、前記サイドスペーサの前記アルミニウム酸化膜と接する側を底部とし、前記サイドスペーサの前記底部と反対側を上部としたとき、前記底部の前記チャネル長方向の長さは、前記上部の前記チャネル長方向の長さよりも大きいことを特徴とする請求項9に記載の表示装置。
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