JP2011243973A - 半導体装置の作製方法 - Google Patents
半導体装置の作製方法 Download PDFInfo
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- JP2011243973A JP2011243973A JP2011094985A JP2011094985A JP2011243973A JP 2011243973 A JP2011243973 A JP 2011243973A JP 2011094985 A JP2011094985 A JP 2011094985A JP 2011094985 A JP2011094985 A JP 2011094985A JP 2011243973 A JP2011243973 A JP 2011243973A
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- film
- oxide semiconductor
- oxygen
- insulating film
- semiconductor film
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- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
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- 229910052758 niobium Inorganic materials 0.000 description 1
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- 239000003870 refractory metal Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- 239000000243 solution Substances 0.000 description 1
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- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- OYQCBJZGELKKPM-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O-2].[Zn+2].[O-2].[In+3] OYQCBJZGELKKPM-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】酸化物半導体膜を有するボトムゲート構造のトランジスタの作製工程において、熱処理による脱水化または脱水素化処理、及び酸素ドープ処理を行う。酸素ドープ処理されたゲート絶縁膜、熱処理による脱水化または脱水素化処理された酸化物半導体膜を有するトランジスタは、バイアス−熱ストレス試験(BT試験)前後においてもトランジスタのしきい値電圧の変化量が低減できており、信頼性の高いトランジスタとすることができる。
【選択図】図1
Description
例えば、酸化物半導体膜としてIn−Ga−Zn−O系酸化物半導体膜を用いる場合、酸素のドープなどによって酸素の比率を化学量論比の1倍を超えて2倍まで(2倍未満)とするのがより好ましい。例えば、理想的なIn−Ga−Zn−O系酸化物半導体の単結晶の化学量論比はIn:Ga:Zn:O=1:1:1:4であるから、組成がInGaZnOxで表される酸化物半導体薄膜において、Xは4を超えて8未満とするのがより好ましい。
本実施の形態では、半導体装置及び半導体装置の作製方法の一形態を、図1乃至図3を用いて説明する。本実施の形態では、半導体装置の一例として酸化物半導体膜を有するトランジスタを示す。
本実施の形態では、半導体装置及び半導体装置の作製方法の他の一形態を、図4及び図5を用いて説明する。本実施の形態では、半導体装置の一例として酸化物半導体膜を有するトランジスタを示す。実施の形態1と同一部分又は同様な機能を有する部分、及び工程は、実施の形態1と同様に行うことができ、繰り返しの説明は省略する。また同じ箇所の詳細な説明は省略する。
本実施の形態では、半導体装置の他の一形態を図13を用いて説明する。上記実施の形態と同一部分又は同様な機能を有する部分、及び工程は、上記実施の形態と同様に行うことができ、繰り返しの説明は省略する。また同じ箇所の詳細な説明は省略する。
本実施の形態では、酸素ドープ処理に用いることができるプラズマ装置(アッシング装置とも呼ぶ)の例を説明する。なお、この装置は、例えば第5世代以降の大型のガラス基板などに対応することができる点で、イオン注入装置などよりも工業的に適している。
実施の形態1乃至3のいずれかで一例を示したトランジスタを用いて表示機能を有する半導体装置(表示装置ともいう)を作製することができる。また、トランジスタを含む駆動回路の一部または全体を、画素部と同じ基板上に一体形成し、システムオンパネルを形成することができる。
実施の形態1乃至3のいずれかで一例を示したトランジスタを用いて、対象物の情報を読み取るイメージセンサ機能を有する半導体装置を作製することができる。
本明細書に開示する半導体装置は、さまざまな電子機器(遊技機も含む)に適用することができる。電子機器としては、例えば、テレビジョン装置(テレビ、またはテレビジョン受信機ともいう)、コンピュータ用などのモニタ、デジタルカメラ、デジタルビデオカメラ等のカメラ、デジタルフォトフレーム、携帯電話機(携帯電話、携帯電話装置ともいう)、携帯型ゲーム機、携帯情報端末、音響再生装置、パチンコ機などの大型ゲーム機などが挙げられる。上記実施の形態で説明した液晶表示装置を具備する電子機器の例について説明する。
Claims (7)
- ゲート電極層を形成し、
前記ゲート電極層上にゲート絶縁膜を形成し、
前記ゲート絶縁膜に酸素ドープ処理を行って、前記ゲート絶縁膜に酸素原子を供給し、
前記ゲート絶縁膜上の前記ゲート電極層と重畳する領域に酸化物半導体膜を形成し、
前記酸化物半導体膜に熱処理を行って、前記酸化物半導体膜中の水素原子を除去し、
前記酸化物半導体膜と電気的に接続するソース電極層及びドレイン電極層を形成し、
前記酸化物半導体膜、前記ソース電極層及び前記ドレイン電極層上に前記酸化物半導体膜に接して絶縁膜を形成することを特徴とする半導体装置の作製方法。 - 化学量論比の1倍を超えて4倍までの比率の酸素原子が含まれるように、前記ゲート絶縁膜に酸素ドープ処理を行う請求項1に記載の半導体装置の作製方法。
- 前記ゲート絶縁膜または前記絶縁膜として、前記酸化物半導体膜の成分元素を含む絶縁膜を形成する請求項1又は請求項2に記載の半導体装置の作製方法。
- 前記ゲート絶縁膜または前記絶縁膜として、前記酸化物半導体膜の成分元素を含む絶縁膜と、当該絶縁膜の成分元素とは異なる元素を含む膜を形成する請求項1乃至3のいずれか一に記載の半導体装置の作製方法。
- 前記ゲート絶縁膜または前記絶縁膜として、酸化ガリウムを含む絶縁膜を形成する請求項1乃至4のいずれか一に記載の半導体装置の作製方法。
- 前記ゲート絶縁膜または前記絶縁膜として、酸化ガリウムを含む絶縁膜と、酸化ガリウムとは異なる材料を含む膜を形成する請求項1乃至5のいずれか一に記載の半導体装置の作製方法。
- 前記絶縁膜を覆うように、窒素を含有する絶縁膜を形成する請求項1乃至6のいずれか一に記載の半導体装置の作製方法。
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