JP6920785B2 - 表示装置 - Google Patents
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- JP6920785B2 JP6920785B2 JP2015161982A JP2015161982A JP6920785B2 JP 6920785 B2 JP6920785 B2 JP 6920785B2 JP 2015161982 A JP2015161982 A JP 2015161982A JP 2015161982 A JP2015161982 A JP 2015161982A JP 6920785 B2 JP6920785 B2 JP 6920785B2
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- 239000004065 semiconductor Substances 0.000 claims description 103
- 239000010409 thin film Substances 0.000 claims description 99
- 239000010408 film Substances 0.000 claims description 82
- 239000003990 capacitor Substances 0.000 claims description 70
- 239000000758 substrate Substances 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 claims description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 3
- 229920005591 polysilicon Polymers 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 82
- 101100214488 Solanum lycopersicum TFT2 gene Proteins 0.000 description 19
- 125000006850 spacer group Chemical group 0.000 description 14
- 101100489584 Solanum lycopersicum TFT1 gene Proteins 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- -1 OP bank opening Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000002784 hot electron Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- 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
- 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
- H01L27/1255—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 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 integrated with passive devices, e.g. auxiliary capacitors
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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
- H01L27/1218—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 structure of the substrate
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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
- H01L27/124—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 layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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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
- H01L29/78603—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the insulating substrate or support
-
- 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
- H01L29/78645—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with multiple 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
- H01L29/78645—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with multiple gate
- H01L29/78648—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with multiple gate arranged on opposing sides of the channel
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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
- 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
- H01L29/78696—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Geometry (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Thin Film Transistor (AREA)
Description
の通りである。
本発明の第1の実施形態にかかる有機EL表示装置は、アレイ基板SUB(図3参照)と、アレイ基板SUBに対向する対向基板と、アレイ基板SUBに接続されるフレキシブル回路基板と、ドライバ集積回路とを含む。対向基板にカラーフィルタが設けられ、カラーフィルタと白色OLED(Organic Light Emitting Diode)との組合せによりフルカラー表示が実現される。白色OLEDの代わりにRGB等のそれぞれの色を発光する発光素子を用いてもよく、この場合には対向基板およびカラーフィルタは存在しなくてもよい。
次に本発明の第2の実施形態にかかる有機EL表示装置について説明する。本実施形態ではチャネル領域にホールアキュムレーション抑制のための構造が設けられている。以下では第2の実施形態にかかる有機EL表示装置のうち、第1の実施形態と異なる部分を中心に説明する。
次に本発明の第3の実施形態にかかる有機EL表示装置について説明する。本実施形態ではチャネル半導体膜SCの上に形成されるスペーサSP(図14、図15等参照)を併用することでさらにチャネル長を増加させている。以下では第3の実施形態にかかる有機EL表示装置のうち、第1の実施形態と異なる部分、特に薄膜トランジスタTFT2の構造の相違について説明する。
Claims (8)
- マトリクス状に配置された複数の画素のそれぞれに設けられた、前記画素の輝度を調整する電流又は電圧を制御するための薄膜トランジスタと、
前記薄膜トランジスタの下に設けられる下地層と、
前記下地層の下層に設けられる基板と、
を有し、
前記薄膜トランジスタは、前記下地層の上に設けられた第1ゲート電極と、前記第1ゲート電極の上層に設けられた半導体層と、前記半導体層の上層に設けられた第2ゲート電極と、を有し、
前記半導体層は、ソース領域及びドレイン領域並びに前記ソース領域及び前記ドレイン領域の間にあるチャネル領域を含み、
前記第1ゲート電極は、前記チャネル領域の下層においてチャネル長方向に並び互いに離間する第1部分電極と第2部分電極とを含み、前記第1部分電極と前記第2部分電極との間に前記第1ゲート電極は存在せず、
前記第1ゲート電極は、前記半導体層より下層において、前記第1部分電極および前記第2部分電極の厚みにより2つの凸部を形成し、前記第1部分電極と前記第2部分電極との間に凹部を形成し、
前記半導体層の前記チャネル領域は、前記凹部と前記2つの凸部とによって、前記チャネル領域のチャネル長方向の断面において立体的に屈曲し、
前記第1ゲート電極と前記第2ゲート電極は、電気的に接続し、
前記基板は、前記第1部分電極と前記第2部分電極との間の下方に凹部を有し、
前記下地層は、当該基板が有する凹部にそってへこむ凹部を有することを特徴とする表示装置。 - 請求項1に記載された表示装置において、
前記第1ゲート電極に含まれる前記第1部分電極と前記第2部分電極は、前記下地層が有する前記凹部の側面に至るように設けられることを特徴とする表示装置。 - 請求項2に記載された表示装置において、
前記第1ゲート電極は、前記下地層が有する前記凹部の底面を避けて設けられることを特徴とする表示装置。 - 請求項1から3のいずれか1項に記載された表示装置において、
前記第1ゲート電極は、前記チャネル長に沿った方向の端部で斜めに下降する表面形状を有することを特徴とする表示装置。 - 請求項1から4のいずれか1項に記載された表示装置において、
前記第1ゲート電極及び前記第2ゲート電極は、前記チャネル長に沿った方向にずれた位置に端部があることを特徴とする表示装置。 - 請求項1から5のいずれか1項に記載された表示装置において、
前記チャネルは、ポリシリコン、アモルファスシリコン、酸化物半導体のいずれかを含むことを特徴とする表示装置。 - 請求項1から6のいずれか1項に記載された表示装置において、
前記画素に用いる複数のTFTについて、異なる種類のTFTを組合せた表示装置。 - 請求項1に記載された表示装置において、
前記複数の画素のそれぞれは、キャパシタをさらに有し、
前記第1ゲート電極および前記第2ゲート電極は前記キャパシタの一方の電極であり、
前記半導体層と同層の他の半導体層は前記キャパシタの他方の電極であり、
前記第1ゲート電極と前記半導体層との間、および前記第1ゲート電極と前記他の半導体層との間には第1絶縁膜が配置され、
前記第2ゲート電極と前記半導体層との間、および前記第2ゲート電極と前記他の半導体層との間には第2絶縁膜が配置され、
前記第1ゲート電極と前記半導体層との間の前記第1絶縁膜と、前記第2ゲート電極と前記半導体層との間の前記第2絶縁膜が前記薄膜トランジスタのゲート絶縁膜となり、
前記第1ゲート電極と前記他の半導体層の間の前記第1絶縁膜と、前記第2ゲート電極と前記他の半導体層の間の前記第2絶縁膜が前記キャパシタの電極間誘電体膜である表示装置。
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JP2015161982A JP6920785B2 (ja) | 2015-08-19 | 2015-08-19 | 表示装置 |
US15/236,629 US9768205B2 (en) | 2015-08-19 | 2016-08-15 | Display device |
US15/671,509 US10249650B2 (en) | 2015-08-19 | 2017-08-08 | Display device |
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JP2015161982A JP6920785B2 (ja) | 2015-08-19 | 2015-08-19 | 表示装置 |
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JP2017041527A JP2017041527A (ja) | 2017-02-23 |
JP6920785B2 true JP6920785B2 (ja) | 2021-08-18 |
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JP6920785B2 (ja) * | 2015-08-19 | 2021-08-18 | 株式会社ジャパンディスプレイ | 表示装置 |
KR102373418B1 (ko) * | 2015-08-31 | 2022-03-14 | 엘지디스플레이 주식회사 | 표시장치 |
KR101841365B1 (ko) * | 2016-11-08 | 2018-03-22 | 성균관대학교산학협력단 | 촉각 피드백 장치 |
WO2018182738A1 (en) * | 2017-03-31 | 2018-10-04 | Intel Corporation | Thin film transistors with spacer controlled gate length |
WO2018235136A1 (ja) * | 2017-06-19 | 2018-12-27 | シャープ株式会社 | アクティブマトリクス基板、アクティブマトリクス基板の製造方法および表示装置の製造方法 |
JP6536634B2 (ja) * | 2017-07-28 | 2019-07-03 | セイコーエプソン株式会社 | 電気光学装置および電子機器 |
CN107331338B (zh) * | 2017-08-28 | 2021-08-17 | 京东方科技集团股份有限公司 | 一种阵列基板、显示装置及其检测方法 |
JP6853770B2 (ja) * | 2017-11-30 | 2021-03-31 | 株式会社Joled | 半導体装置および表示装置 |
JP7022592B2 (ja) * | 2018-01-11 | 2022-02-18 | 株式会社ジャパンディスプレイ | 表示装置 |
KR102513333B1 (ko) * | 2018-01-31 | 2023-03-23 | 삼성디스플레이 주식회사 | 표시 장치 |
KR102548131B1 (ko) | 2018-12-18 | 2023-06-27 | 엘지디스플레이 주식회사 | 박막 트랜지스터 및 디스플레이 패널 |
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JP5371144B2 (ja) * | 2007-06-29 | 2013-12-18 | 株式会社半導体エネルギー研究所 | 半導体装置及び半導体装置の作製方法、並びに電子機器 |
JP2009043748A (ja) | 2007-08-06 | 2009-02-26 | Seiko Epson Corp | 半導体装置および電気光学装置 |
JP2009152487A (ja) * | 2007-12-21 | 2009-07-09 | Seiko Epson Corp | 薄膜トランジスタ、半導体装置及び電気光学装置 |
US9799773B2 (en) * | 2011-02-02 | 2017-10-24 | Semiconductor Energy Laboratory Co., Ltd. | Transistor and semiconductor device |
US9099437B2 (en) * | 2011-03-08 | 2015-08-04 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
CN102956649A (zh) * | 2012-11-26 | 2013-03-06 | 京东方科技集团股份有限公司 | 阵列基板、阵列基板制作方法及显示装置 |
JP6920785B2 (ja) * | 2015-08-19 | 2021-08-18 | 株式会社ジャパンディスプレイ | 表示装置 |
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US9768205B2 (en) | 2017-09-19 |
US20170338253A1 (en) | 2017-11-23 |
US10249650B2 (en) | 2019-04-02 |
US20170053951A1 (en) | 2017-02-23 |
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