JP2012089844A - 薄膜トランジスタ基板およびそれの製造方法 - Google Patents
薄膜トランジスタ基板およびそれの製造方法 Download PDFInfo
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- 239000010409 thin film Substances 0.000 title claims abstract description 69
- 239000000758 substrate Substances 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 37
- 239000010408 film Substances 0.000 claims description 110
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 42
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 39
- 229910052710 silicon Inorganic materials 0.000 claims description 39
- 239000010703 silicon Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 30
- 239000013078 crystal Substances 0.000 claims description 11
- 229910021424 microcrystalline silicon Inorganic materials 0.000 claims description 10
- 238000000059 patterning Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 230000001681 protective effect Effects 0.000 description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 7
- 238000002425 crystallisation Methods 0.000 description 7
- 239000011651 chromium Substances 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000000151 deposition Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 239000011733 molybdenum Substances 0.000 description 5
- 229910052715 tantalum Inorganic materials 0.000 description 5
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003870 refractory metal Substances 0.000 description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910000077 silane Inorganic materials 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- 239000004033 plastic Substances 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
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005224 laser annealing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 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
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
- H01L29/456—Ohmic electrodes on silicon
- H01L29/458—Ohmic electrodes on silicon for thin film silicon, e.g. source or drain electrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66742—Thin film unipolar transistors
- H01L29/6675—Amorphous silicon or polysilicon transistors
- H01L29/66765—Lateral single gate single channel transistors with inverted structure, i.e. the channel layer is formed after the gate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- 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
- H01L29/78618—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 characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- 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
- H01L29/78651—Silicon transistors
- H01L29/7866—Non-monocrystalline silicon transistors
- H01L29/78672—Polycrystalline or microcrystalline silicon transistor
- H01L29/78678—Polycrystalline or microcrystalline silicon transistor with inverted-type structure, e.g. with bottom gate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- 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
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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
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thin Film Transistor (AREA)
- Liquid Crystal (AREA)
- Electrodes Of Semiconductors (AREA)
- Recrystallisation Techniques (AREA)
Abstract
【解決手段】本発明の薄膜トランジスタ基板は、基板上に形成されたゲート電極、前記ゲート電極上に前記ゲート電極と重なるように形成され、多結晶シリコンを含むアクティブ層、前記アクティブ層上に前記ゲート電極を中心に両側に分離して形成された第1オーミックコンタクト層、前記第1オーミックコンタクト層上に形成された第2オーミックコンタクト層および前記第2オーミックコンタクト層上に形成されたソース電極およびドレーン電極を含む。
【選択図】図2
Description
図面と共に詳細に後述する実施形態を参照すれば明確になるであろう。しかし、本発明は、以下に開示する実施形態に限定されるものではなく、異なる多様な形態で具現することが可能である。本実施形態は、単に本発明の開示が完全になるように、本発明が属する技術分野で通常の知識を有する者に対して発明の範疇を完全に知らしめるために提供するものであり、本発明は、請求項の範疇によってのみ定義される。図面において、層及び領域のサイズ及び相対的なサイズは、説明の明瞭性のために誇張することがある。
26 ゲート電極
30 ゲート絶縁膜
40 アクティブ層
55a、56a 第1オーミックコンタクト層
55b、56b 第2オーミックコンタクト層
65 ソース電極
66 ドレーン電極
70 保護膜
82 画素電極
Claims (20)
- 基板上に形成されたゲート電極と、
前記ゲート電極上に前記ゲート電極と重なるように形成され、多結晶シリコンを含むアクティブ層と、
前記アクティブ層上に前記ゲート電極を中心に両側に分離して形成された第1オーミックコンタクト層と、
前記第1オーミックコンタクト層上に形成された第2オーミックコンタクト層、および
前記第2オーミックコンタクト層上に形成されたソース電極およびドレーン電極を含む薄膜トランジスタ基板。 - 前記第1オーミックコンタクト層および第2オーミックコンタクト層はシリコンを含み、前記第1オーミックコンタクト層のバンドギャップ(band gap)エネルギーが第2オーミックコンタクト層のバンドギャップエネルギーより小さい請求項1に記載の薄膜トランジスタ基板。
- 前記アクティブ層のバンドギャップエネルギーが前記第1オーミックコンタクト層のバンドギャップエネルギーより小さい請求項2に記載の薄膜トランジスタ基板。
- 前記第1オーミックコンタクト層のバンドギャップエネルギーが1.1eV〜1.5 eVである請求項3に記載の薄膜トランジスタ基板。
- 前記第1オーミックコンタクト層は、前記第2オーミックコンタクト層より高い結晶化度を有する請求項2に記載の薄膜トランジスタ基板。
- 前記第1オーミックコンタクト層がドーピングされた微細結晶シリコンで形成された請求項5に記載の薄膜トランジスタ基板。
- 前記第2オーミックコンタクト層がドーピングされた非晶質シリコンで形成された請求項6に記載の薄膜トランジスタ基板。
- 前記第1オーミックコンタクト層が前記第2オーミックコンタクト層より高い結晶化度を有する請求項1に記載の薄膜トランジスタ基板。
- 前記第1オーミックコンタクト層がドーピングされた微細結晶シリコンで形成された請求項8に記載の薄膜トランジスタ基板。
- 前記第2オーミックコンタクト層がドーピングされた非晶質シリコンで形成された請求項8に記載の薄膜トランジスタ基板。
- 基板上にゲート電極を形成するゲート電極形成ステップと、
前記ゲート電極上にゲート絶縁膜、多結晶シリコン膜、ドーピングされた第1シリコン膜およびドーピングされた第2シリコン膜を順次に積層する多層膜形成ステップと、
前記多結晶シリコン膜をパターニングしてアクティブ層を形成するステップ、および
前記アクティブ層の所定領域が露出するように前記ドーピングされた第1シリコン膜およびドーピングされた第2シリコン膜をパターニングして第1および第2オーミックコンタクト層を形成するコンタクト層形成ステップを含む薄膜トランジスタ基板の製造方法。 - 前記第1オーミックコンタクト層のバンドギャップエネルギーが前記アクティブ層のバンドギャップエネルギーより大きく、前記第2オーミックコンタクト層のバンドギャップエネルギーより小さい請求項11に記載の薄膜トランジスタ基板の製造方法。
- 前記第1オーミックコンタクト層のバンドギャップエネルギーが1.1eV〜1.5 eVである請求項12に記載の薄膜トランジスタ基板の製造方法。
- 前記多層膜形成ステップで多結晶シリコン膜が前記ゲート絶縁膜上に非晶質シリコン膜を積層し、これを熱処理して結晶を形成したものである請求項12に記載の薄膜トランジスタ基板の製造方法。
- 前記熱処理がレーザビームによる熱処理である請求項14に記載の薄膜トランジスタ基板の製造方法。
- 前記第1オーミックコンタクト層が前記第2オーミックコンタクト層より高い結晶化度を有する請求項11に記載の薄膜トランジスタ基板
- 前記第1オーミックコンタクト層がドーピングされた微細結晶シリコンで形成された請求項16に記載の薄膜トランジスタ基板
- 前記第2オーミックコンタクト層がドーピングされた非晶質シリコンで形成された請求項16に記載の薄膜トランジスタ基板
- 前記多層膜形成ステップで多結晶シリコン膜が前記ゲート絶縁膜上に非晶質シリコン膜を積層してこれを熱処理し、結晶を形成したものである請求項16に記載の薄膜トランジスタ基板の製造方法。
- 前記熱処理がレーザビームによる熱処理である請求項19に記載の薄膜トランジスタ基板の製造方法。
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CN113161292B (zh) * | 2021-04-12 | 2023-04-25 | 北海惠科光电技术有限公司 | 阵列基板的制作方法、阵列基板及显示面板 |
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JPH0335563A (ja) * | 1989-06-30 | 1991-02-15 | Fujitsu Ltd | 薄膜トランジスタ |
JPH03293731A (ja) * | 1990-04-12 | 1991-12-25 | Seiko Epson Corp | 半導体装置の製造方法 |
JPH10256554A (ja) * | 1997-03-13 | 1998-09-25 | Toshiba Corp | 薄膜トランジスタ及びその製造方法 |
JP2008258345A (ja) * | 2007-04-04 | 2008-10-23 | Sony Corp | 薄膜トランジスタおよびその製造方法ならびに表示装置 |
JP2010182716A (ja) * | 2009-02-03 | 2010-08-19 | Sharp Corp | 薄膜トランジスタ、その製造方法および表示装置 |
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EP0473988A1 (en) * | 1990-08-29 | 1992-03-11 | International Business Machines Corporation | Method of fabricating a thin film transistor having amorphous/polycrystalline semiconductor channel region |
JP2008091599A (ja) * | 2006-10-02 | 2008-04-17 | Sony Corp | 薄膜トランジスタおよびその製造方法ならびに表示装置 |
KR101388582B1 (ko) * | 2007-10-26 | 2014-04-23 | 삼성디스플레이 주식회사 | 전기 영동 표시 장치 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0335563A (ja) * | 1989-06-30 | 1991-02-15 | Fujitsu Ltd | 薄膜トランジスタ |
JPH03293731A (ja) * | 1990-04-12 | 1991-12-25 | Seiko Epson Corp | 半導体装置の製造方法 |
JPH10256554A (ja) * | 1997-03-13 | 1998-09-25 | Toshiba Corp | 薄膜トランジスタ及びその製造方法 |
JP2008258345A (ja) * | 2007-04-04 | 2008-10-23 | Sony Corp | 薄膜トランジスタおよびその製造方法ならびに表示装置 |
JP2010182716A (ja) * | 2009-02-03 | 2010-08-19 | Sharp Corp | 薄膜トランジスタ、その製造方法および表示装置 |
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JP5937332B2 (ja) | 2016-06-22 |
US20120091461A1 (en) | 2012-04-19 |
KR20120088037A (ko) | 2012-08-08 |
KR101761634B1 (ko) | 2017-07-27 |
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