JP5412105B2 - 半導体装置、及びそれを有する表示装置 - Google Patents
半導体装置、及びそれを有する表示装置 Download PDFInfo
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- JP5412105B2 JP5412105B2 JP2008324017A JP2008324017A JP5412105B2 JP 5412105 B2 JP5412105 B2 JP 5412105B2 JP 2008324017 A JP2008324017 A JP 2008324017A JP 2008324017 A JP2008324017 A JP 2008324017A JP 5412105 B2 JP5412105 B2 JP 5412105B2
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- 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
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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
- H01L27/1222—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
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- 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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- 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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Description
本実施の形態では、移動度及びオン電流が高く、且つオフ電流の低い薄膜トランジスタの作製工程について、以下に示す。本実施の形態では、図14に示す表示装置の素子基板1300の上面図において、画素部1331の各画素に形成される薄膜トランジスタ、画素電極、及び容量素子の作製工程を以下に示す。
本実施の形態では、実施の形態1と比較して、フォトマスク数を削減することが可能なプロセスを用いて薄膜トランジスタを作製する工程について示す。
本実施の形態では、実施の形態1及び実施の形態2の薄膜トランジスタと異なる形態について、以下に示す。
本実施の形態では、上記実施の形態で示す薄膜トランジスタの構造について、以下に示す。
本実施の形態では、図14に示す素子基板1300において、画素部1331と入力端子1332、1333との間に形成される保護回路1334、1336の構成及びその作製方法について、以下に示す。本実施の形態で示す保護回路は、ショットキー接合されたダイオードを用いて形成する。
本実施の形態では、実施の形態5とは異なる保護回路の構造及び作製方法について、以下に示す。本実施の形態では、ドナーとなる不純物元素を含む微結晶半導体膜、第1のバッファ層、及び第2のバッファ層と、コモン線とでショットキー接合するダイオードを用いて示す。
本実施の形態では、実施の形態5及び実施の形態6とは異なる保護回路の構造及び作製方法について、以下に示す。本実施の形態では、ドナーとなる不純物元素を含む微結晶半導体膜、第1のバッファ層、及び第2のバッファ層でショットキー接合するダイオードを用いて示す。
本実施の形態では、上記実施の形態での成膜工程に用いることが可能な成膜装置及びそこでの基板の流れを以下に示す。
本実施の形態では、上記実施の形態と異なる構造の薄膜トランジスタ及びダイオードについて、以下に示す。
本実施の形態では、図26に示す基板50の周辺部に設けられた走査線(ゲート配線)入力端子部と信号線(ソース配線)入力端子部の構造について、図27を用いて以下に示す。図27は、基板50の周辺部に設けられた走査線入力端子部及び信号線入力端子部、並びに画素部の薄膜トランジスタの断面図を示す。
本実施の形態では、表示装置の一形態として、上記実施の形態で示す薄膜トランジスタを有する液晶表示装置について、以下に示す。ここでは、VA(Vertical Alignment)型の液晶表示装置について、図28乃至図30を用いて説明する。VA型の液晶表示装置とは、液晶パネルの液晶分子の配列を制御する方式の一種である。VA型の液晶表示装置は、電圧が印加されていないときにパネル面に対して液晶分子が垂直方向を向く方式である。本実施の形態では、特に画素(ピクセル)をいくつかの領域(サブピクセル)に分け、それぞれ別の方向に分子を倒すよう工夫されている。これをマルチドメイン化あるいはマルチドメイン設計という。以下の説明では、マルチドメイン設計が考慮された液晶表示装置について説明する。
本実施の形態では、表示装置の一形態として、上記実施の形態で示す薄膜トランジスタを有する発光装置について、以下に示す。ここでは、発光装置が有する画素の構成について説明する。図31(A)に、画素の上面図の一形態を示し、図31(B)に図31(A)のA−Bに対応する画素の断面構造の一形態を示す。
次に、本発明の表示装置の一形態である表示パネルの構成について、以下に示す。
本発明により得られる表示装置等によって、アクティブマトリクス型表示装置パネルに用いることができる。即ち、それらを表示部に組み込んだ電子機器全てに本発明を実施できる。
Claims (12)
- 電極と
前記電極上に設けられた絶縁膜と、
前記絶縁膜上に設けられ、且つドナーとなる不純物元素が添加された微結晶半導体膜と、
ドナーとなる不純物元素が添加される工程を経ずに設けられた前記微結晶半導体膜上の非晶質半導体膜と、
前記非晶質半導体膜上に設けられた不純物半導体膜と、
前記不純物半導体膜に接する配線と、
前記電極及び前記配線を接続する第1の導電膜と、
前記非晶質半導体膜とショットキー接合された第2の導電膜と、を有することを特徴とする半導体装置。 - ゲート電極上に、ゲート絶縁膜を介して該ゲート電極の端部に至らない内側領域に設けられ、且つドナーとなる不純物元素が添加された微結晶半導体膜と、
ドナーとなる不純物元素が添加される工程を経ずに設けられた前記微結晶半導体膜の上面及び側面を被覆する非晶質半導体膜と、
前記非晶質半導体膜上に設けられ、且つソース領域またはドレイン領域を形成する一導電型の不純物元素が添加された不純物半導体膜と、
前記不純物半導体膜に接する配線と、
前記非晶質半導体膜とショットキー接続された第1の導電膜と、を有し、
前記ゲート電極及び前記配線は第2の導電膜で接続されることを特徴とする半導体装置。 - ゲート電極上に、ゲート絶縁膜を介して該ゲート電極の端部に至らない内側領域に設けられ、且つドナーとなる不純物元素が添加された微結晶半導体膜と、
ドナーとなる不純物元素が添加される工程を経ずに設けられた前記微結晶半導体膜の上面及び側面を被覆する非晶質半導体膜と、
前記非晶質半導体膜上に設けられ、且つソース領域またはドレイン領域を形成する一導電型の不純物元素が添加された不純物半導体膜と、
前記不純物半導体膜に接する配線と、
コモン線と、を有し、
前記ゲート電極及び前記配線は第1の導電膜で接続され、
前記非晶質半導体膜と前記コモン線とが前記非晶質半導体膜とショットキー接続された第2の導電膜で接続されることを特徴とする半導体装置。 - 請求項1乃至3のいずれか一項において、
前記微結晶半導体膜のソース領域またはドレイン領域側の端部は、前記非晶質半導体膜、前記不純物半導体膜と重なることを特徴とする半導体装置。 - 請求項1乃至4のいずれか一項において、
前記非晶質半導体膜の端部の一部が前記配線に覆われることを特徴とする半導体装置。 - 請求項1乃至5のいずれか一項において、
前記微結晶半導体膜に重ねて非晶質半導体膜が設けられていることを特徴とする半導体装置。 - 請求項1乃至6のいずれか一項において、
前記微結晶半導体膜は、微結晶シリコン膜、微結晶ゲルマニウム膜、または微結晶シリコンゲルマニウム膜であることを特徴とする半導体装置。 - 請求項1乃至6のいずれか一項において、
前記微結晶半導体膜は、微結晶シリコン膜及び微結晶ゲルマニウム膜の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6のいずれか一項において、
前記微結晶半導体膜は、ドナーとなる不純物元素が添加された結晶粒と、前記結晶粒を覆うゲルマニウム膜とであることを特徴とする半導体装置。 - 請求項1乃至6のいずれか一項において、
前記微結晶半導体膜の代わりに、非晶質ゲルマニウム膜、または非晶質シリコンゲルマニウム膜を用いることを特徴とする半導体装置。 - 請求項1乃至10のいずれか一項において、
ドナーとなる不純物元素は、リン、砒素、またはアンチモンであることを特徴とする半導体装置。 - 請求項1乃至11のいずれか一項に記載の半導体装置を有することを特徴とする表示装置。
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JP2022064966A (ja) | 2022-04-26 |
JP6283079B2 (ja) | 2018-02-21 |
EP2073255B1 (en) | 2016-08-10 |
JP2018101791A (ja) | 2018-06-28 |
JP2009170900A (ja) | 2009-07-30 |
EP2073255A3 (en) | 2013-02-20 |
KR101511494B1 (ko) | 2015-04-13 |
JP7246533B2 (ja) | 2023-03-27 |
JP2017034262A (ja) | 2017-02-09 |
EP2073255A2 (en) | 2009-06-24 |
JP2023085314A (ja) | 2023-06-20 |
JP2014068024A (ja) | 2014-04-17 |
JP2015079968A (ja) | 2015-04-23 |
JP2020074359A (ja) | 2020-05-14 |
US7786482B2 (en) | 2010-08-31 |
JP6585201B2 (ja) | 2019-10-02 |
US20090159885A1 (en) | 2009-06-25 |
KR20090068180A (ko) | 2009-06-25 |
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