JP5292434B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5292434B2 JP5292434B2 JP2011077995A JP2011077995A JP5292434B2 JP 5292434 B2 JP5292434 B2 JP 5292434B2 JP 2011077995 A JP2011077995 A JP 2011077995A JP 2011077995 A JP2011077995 A JP 2011077995A JP 5292434 B2 JP5292434 B2 JP 5292434B2
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- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
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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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- 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
- H01L29/78621—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 with LDD structure or an extension or an offset region or characterised by the doping profile
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- 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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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13454—Drivers integrated on the active matrix substrate
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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
- H01L29/78621—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 with LDD structure or an extension or an offset region or characterised by the doping profile
- H01L2029/7863—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 with LDD structure or an extension or an offset region or characterised by the doping profile with an LDD consisting of more than one lightly doped zone or having a non-homogeneous dopant distribution, e.g. graded LDD
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Description
で構成された回路を有する半導体装置およびその作製方法に関する。特に本発明は、画素部とその周辺に設けられる駆動回路を同一の基板上に設けた液晶表示装置に代表される電気光学装置、および電気光学装置を搭載した電子機器に好適に利用できる技術を提供する。尚、本明細書において半導体装置とは、半導体特性を利用することで機能する装置全般を指し、上記電気光学装置およびその電気光学装置を搭載した電子機器をその範疇に含んでいる。
このような回路は、nチャネル型TFTとpチャネル型TFTとから成るCMOS回路を基本として形成されていた。このような駆動回路の実装技術が根拠となり、液晶表示装置において軽量化および薄型化を推進するためには、画素部の他に駆動回路を同一基板上に一体形成できる結晶質半導体層を活性層とするTFTが適していることが明らかとなってきた。
。そして、ファラデーの電磁誘導の法則に従い、θ方向に誘導電界Eが生じる(式2)。
111は低抵抗化を図るために含有する不純物濃度を低減させることが好ましく、特に酸素濃度に関しては30ppm以下とすると良かった。例えば、Wは酸素濃度を30ppm以下とすることで20μΩcm以下の比抵抗値を実現することができる。
W膜は結晶粒を大きくすることで低抵抗率化を図ることができるが、W中に酸素などの不純物元素が多い場合には結晶化が阻害され高抵抗化する。このことより、スパッタ法による場合、純度99.9999%のWターゲットを用い、さらに成膜時に気相中からの不純物の混入がないように十分配慮してW膜を形成することにより、抵抗率9〜20μΩcmを実現することができる。
。
第1のpチャネル型TFT(B)200bには、島状半導体層にチャネル形成領域236a、236b、第3の不純物領域から成りゲート電極118と重なるLDD領域237a、237b、第4の不純物領域から成るソース領域238とドレイン領域239、240を有した構造となっている。第1のnチャネル型TFT(B)201bには、島状半導体層にチャネル形成領域241a、241b、第1の不純物領域で形成されゲート電極119と重なるLDD領域242a、242b、第2の不純物領域で形成するソース領域243とドレイン領域244、245を有している。チャネル長はいずれも3〜7μmとして、ゲート電極と重なるLDD領域をLovとしてそのチャネル長方向の長さは0.1〜1.5μm、好ましくは0.3〜0.8μmとする。
を行っても良い(図5(A))。
Claims (5)
- 基板上の下地膜と、
前記下地膜上の島状結晶質半導体層と、
前記島状結晶質半導体層を覆う積層構造のゲート絶縁膜と、
前記ゲート絶縁膜上のゲート電極とを有し、
前記ゲート電極は端部においてテーパー部を有し、
前記ゲート絶縁膜は、前記ゲート電極の前記端部の近傍に、前記ゲート電極の前記端部から離れるに従い除々に膜厚が薄くなる第1の部分を有し、
前記島状結晶質半導体層は、チャネル形成領域、ソース領域、ドレイン領域、第1のLDD領域、及び第2のLDD領域を有し、
前記チャネル形成領域と前記ソース領域または前記チャネル形成領域と前記ドレイン領域との間に、前記第1のLDD領域と前記第2のLDD領域が挟まれており、前記第1のLDD領域は前記チャネル形成領域側に、前記第2のLDD領域は前記ソース領域または前記ドレイン領域側に配置され、
前記第1のLDD領域は前記ゲート電極の前記テーパー部の下に形成され、前記第2のLDD領域は前記ゲート絶縁膜の前記第1の部分の下に形成されることを特徴とする半導体装置。 - 基板上の下地膜と、
前記下地膜上の島状結晶質半導体層と、
前記島状結晶質半導体層を覆う積層構造のゲート絶縁膜と、
前記ゲート絶縁膜上のゲート電極とを有し、
前記ゲート電極は端部においてテーパー部を有し、
前記ゲート絶縁膜は、前記ゲート電極の前記端部の近傍に、前記ゲート電極の前記端部から離れるに従い除々に膜厚が薄くなる第1の部分を有し、
前記島状結晶質半導体層は、チャネル形成領域、ソース領域、ドレイン領域、第1のLDD領域、及び第2のLDD領域を有し、
前記チャネル形成領域と前記ソース領域または前記チャネル形成領域と前記ドレイン領域との間に、前記第1のLDD領域と前記第2のLDD領域が挟まれており、前記第1のLDD領域は前記チャネル形成領域側に、前記第2のLDD領域は前記ソース領域または前記ドレイン領域側に配置され、
前記第1のLDD領域は前記ゲート電極の前記テーパー部の下に形成され、前記第2のLDD領域は前記ゲート絶縁膜の前記第1の部分の下に形成され、
前記第1のLDD領域及び前記第2のLDD領域は、p型の不純物領域であることを特徴とする半導体装置。 - 請求項1または請求項2において、前記基板はガラス基板であることを特徴とする半導体装置。
- 請求項1乃至請求項3のいずれか一において、前記下地膜は積層構造であることを特徴とする半導体装置。
- 請求項1乃至請求項4のいずれか一において、前記半導体装置は、携帯情報端末、液晶表示装置、パーソナルコンピュータ、ビデオカメラ、電子遊技機器、プログラムを記録した記録媒体を用いたプレーヤー、またはデジタルカメラであることを特徴とする半導体装置。
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US6992328B2 (en) | 2006-01-31 |
JP5427969B2 (ja) | 2014-02-26 |
JP2013191864A (ja) | 2013-09-26 |
US20060097258A1 (en) | 2006-05-11 |
JP2011176332A (ja) | 2011-09-08 |
US6664145B1 (en) | 2003-12-16 |
JP2016213481A (ja) | 2016-12-15 |
JP6002814B2 (ja) | 2016-10-05 |
JP5651732B2 (ja) | 2015-01-14 |
JP2013179314A (ja) | 2013-09-09 |
KR20010039746A (ko) | 2001-05-15 |
US20040065883A1 (en) | 2004-04-08 |
JP2015179873A (ja) | 2015-10-08 |
JP2011035418A (ja) | 2011-02-17 |
TW480554B (en) | 2002-03-21 |
US7737441B2 (en) | 2010-06-15 |
JP4801790B2 (ja) | 2011-10-26 |
KR100675263B1 (ko) | 2007-01-29 |
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