JP7152448B2 - ディスプレイ装置 - Google Patents
ディスプレイ装置 Download PDFInfo
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- JP7152448B2 JP7152448B2 JP2020115664A JP2020115664A JP7152448B2 JP 7152448 B2 JP7152448 B2 JP 7152448B2 JP 2020115664 A JP2020115664 A JP 2020115664A JP 2020115664 A JP2020115664 A JP 2020115664A JP 7152448 B2 JP7152448 B2 JP 7152448B2
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- 239000010410 layer Substances 0.000 claims description 659
- 229910052739 hydrogen Inorganic materials 0.000 claims description 205
- 239000001257 hydrogen Substances 0.000 claims description 205
- 239000004065 semiconductor Substances 0.000 claims description 182
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 180
- 230000004888 barrier function Effects 0.000 claims description 173
- 239000010409 thin film Substances 0.000 claims description 139
- 239000010408 film Substances 0.000 claims description 68
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- 239000010936 titanium Substances 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 17
- 229920005591 polysilicon Polymers 0.000 claims description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 13
- 239000007769 metal material Substances 0.000 claims description 13
- 229910052719 titanium Inorganic materials 0.000 claims description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 11
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 11
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 46
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- 150000002431 hydrogen Chemical class 0.000 description 25
- 239000010949 copper Substances 0.000 description 22
- 239000011651 chromium Substances 0.000 description 20
- 229910052581 Si3N4 Inorganic materials 0.000 description 16
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 16
- 239000002356 single layer Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 13
- 239000011810 insulating material Substances 0.000 description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 11
- 229910052750 molybdenum Inorganic materials 0.000 description 11
- 239000011733 molybdenum Substances 0.000 description 11
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 10
- 229910052804 chromium Inorganic materials 0.000 description 10
- 239000004020 conductor Substances 0.000 description 9
- 238000002161 passivation Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 9
- 230000006866 deterioration Effects 0.000 description 8
- 239000010931 gold Substances 0.000 description 8
- 229910052738 indium Inorganic materials 0.000 description 7
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 7
- 239000011368 organic material Substances 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 6
- -1 molybdenum (Mo) Chemical class 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
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- 238000004519 manufacturing process Methods 0.000 description 5
- 229910044991 metal oxide Inorganic materials 0.000 description 5
- 150000004706 metal oxides Chemical class 0.000 description 5
- 229910052779 Neodymium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000001039 wet etching Methods 0.000 description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
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- 150000002500 ions Chemical class 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
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- 235000012239 silicon dioxide Nutrition 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910002065 alloy metal Inorganic materials 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000005137 deposition process Methods 0.000 description 2
- 229910000449 hafnium oxide Inorganic materials 0.000 description 2
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000011232 storage material 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
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229960001296 zinc oxide Drugs 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910001195 gallium oxide Inorganic materials 0.000 description 1
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(iv) oxide Chemical compound O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
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- 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
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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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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
- H01L27/1237—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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 different composition, shape, layout or thickness of the gate insulator in different devices
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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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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
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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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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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- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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
- H01L27/1255—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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 integrated with passive devices, e.g. auxiliary capacitors
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- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- 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
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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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
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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
- H10K59/121—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- 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
Description
(実施例)
200 第1薄膜トランジスタ
300 第2薄膜トランジスタ
310 第2半導体パターン
114 第2ゲート絶縁膜
114r 段差部
330 第2ゲート電極
331 第1水素バリア層
332 ゲート導電層
400 ストレージキャパシタ
500 発光素子
600 封止部材
Claims (24)
- 素子基板上に位置し、ソース領域とドレイン領域との間に位置するチャネル領域を含む酸化物半導体パターンと、
前記酸化物半導体パターンの前記チャネル領域と重畳し、第1水素バリア層とゲート導電層と第2水素バリア層の積層構造であり、前記ゲート導電層は前記第1水素バリア層と前記第2水素バリア層との間に位置する、ゲート電極と、
前記酸化物半導体パターンと前記ゲート電極との間に位置し、前記酸化物半導体パターンの前記ソース領域及び前記ドレイン領域を露出するゲート絶縁膜とを含み、
前記ゲート導電層の側面は、前記第1水素バリア層の側面に垂直に整列され、
前記第2水素バリア層は、前記ゲート導電層の側面に突出する先端領域を含み、
前記ゲート電極は、前記ソース領域に隣接した前記ゲート絶縁膜の一部及び前記ドレイン領域に隣接した前記ゲート絶縁膜の一部を露出する、ディスプレイ装置。 - 前記ゲート絶縁膜は、前記ゲート電極によって露出された領域内に位置する段差部を含む、請求項1に記載のディスプレイ装置。
- 前記ゲート電極は、前記段差部から離隔する側面を含む、請求項2に記載のディスプレイ装置。
- 前記第1水素バリア層は、前記ゲート絶縁膜と前記ゲート導電層との間に位置する、請求項1に記載のディスプレイ装置。
- 前記第1水素バリア層は、前記ゲート絶縁膜と接触する、請求項4に記載のディスプレイ装置。
- 前記第1水素バリア層の側面が各段差部の側壁より内側に位置する、請求項2に記載のディスプレイ装置。
- 素子基板上に位置し、第1方向に互いに平行に位置するソース領域、チャネル領域及びドレイン領域を含む酸化物半導体パターンと、
前記酸化物半導体パターンの前記チャネル領域上に位置するゲート絶縁膜と、
前記ゲート絶縁膜上に位置し、前記第1方向に垂直な第2方向に延びるゲート電極とを含み、
前記ゲート電極は、順に積層された、第1水素バリア層とゲート導電層と第2水素バリア層とを含み、
前記ゲート導電層の側面は、前記第1水素バリア層の側面に垂直に整列され、
前記第2水素バリア層は、前記ゲート導電層の側面に突出する先端領域を含み、
前記第1方向の前記ゲート電極の長さは前記第1方向の前記ゲート絶縁膜の長さより小さい、ディスプレイ装置。 - 前記第1水素バリア層の厚さは前記ゲート導電層の厚さより小さい、請求項7に記載のディスプレイ装置。
- 前記第2方向の前記ゲート電極の長さは前記第2方向の前記ゲート絶縁膜の長さより長い、請求項7に記載のディスプレイ装置。
- 前記酸化物半導体パターンの前記第1方向に延びる側面上には前記ゲート絶縁膜及び前記ゲート電極が積層される、請求項9に記載のディスプレイ装置。
- 前記ゲート電極は前記ゲート絶縁膜の縁部を露出し、
前記ゲート絶縁膜は前記ゲート電極の外側に位置する段差部を含み、
前記第1水素バリア層の側面は各段差部の側壁に垂直に整列される、請求項7に記載のディスプレイ装置。 - 前記第1方向において、前記第1水素バリア層の下面は前記ゲート絶縁膜の下面より小さい幅を有する、請求項7に記載のディスプレイ装置。
- ポリシリコンを含む第1半導体パターン、第1ゲート絶縁膜を挟んで前記第1半導体パターンと重畳する第1ゲート電極、及び前記第1半導体パターンと連結される第1ソース電極及び第1ドレイン電極を含む第1薄膜トランジスタと、
酸化物半導体を含む第2半導体パターン、第2ゲート絶縁膜を挟んで前記第2半導体パターンと重畳する第2ゲート電極、及び前記第2半導体パターンと連結される第2ソース電極及び第2ドレイン電極を含む第2薄膜トランジスタとを含み、
前記第2ゲート電極は、前記第2ゲート絶縁膜上に配置された第1水素バリア層、前記第1水素バリア層上に配置されたゲート導電層、及び前記ゲート導電層上に配置された第2水素バリア層を含み、
前記ゲート導電層の側面は、前記第1水素バリア層の側面に垂直に整列され、
前記第2水素バリア層は、前記ゲート導電層の側面に突出する先端領域を含み、
前記第1水素バリア層の両側面は、前記第2ゲート絶縁膜の両側面より内側に位置する、ディスプレイ装置。 - 前記ゲート導電層と前記第1水素バリア層は互いに異なる金属物質を含む、請求項13に記載のディスプレイ装置。
- 前記ゲート導電層の厚さは前記第1水素バリア層の厚さより大きい、請求項13に記載のディスプレイ装置。
- 前記第1水素バリア層は、チタン(Ti)金属又はチタン合金を含む、請求項14に記載のディスプレイ装置。
- 前記第2ゲート絶縁膜の上面は、前記第1水素バリア層と重畳せずに延びる突出部を含む、請求項14に記載のディスプレイ装置。
- 前記第2ゲート絶縁膜の前記突出部は段差部を有する、請求項17に記載のディスプレイ装置。
- 前記第2ゲート絶縁膜は、前記第1水素バリア層と重畳する領域で第1厚さを有し、前記第1水素バリア層と重畳しない領域で第2厚さを有する、請求項18に記載のディスプレイ装置。
- 前記第2ゲート絶縁膜の前記突出部に位置する短絡防止パターンをさらに含み、
前記短絡防止パターンは、
前記第1水素バリア層の左側面と接触するように配置された第1短絡防止パターン、及び
前記第1水素バリア層の右側面と接触するように配置された第2短絡防止パターン
を含む、請求項17に記載のディスプレイ装置。 - 前記短絡防止パターンは、チタン酸化物系(TiOx)物質を含む、請求項20に記載のディスプレイ装置。
- 前記第1厚さが前記第2厚さよりも大きい、請求項19に記載のディスプレイ装置。
- 前記第2半導体パターンと前記第2ゲート電極との上に位置する層間絶縁膜をさらに含み、
前記短絡防止パターンの上面は前記層間絶縁膜と接触して、前記短絡防止パターンの下面は前記第2ゲート絶縁膜と接触する、請求項20に記載のディスプレイ装置。 - 前記第1短絡防止パターン及び前記第2短絡防止パターンは、前記第1水素バリア層とは異なる物質を含む、請求項20に記載のディスプレイ装置。
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