JP2013140949A - 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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- JP2013140949A JP2013140949A JP2012253870A JP2012253870A JP2013140949A JP 2013140949 A JP2013140949 A JP 2013140949A JP 2012253870 A JP2012253870 A JP 2012253870A JP 2012253870 A JP2012253870 A JP 2012253870A JP 2013140949 A JP2013140949 A JP 2013140949A
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- Prior art keywords
- film
- insulating film
- oxygen
- oxide semiconductor
- gate insulating
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- 229910052739 hydrogen Inorganic materials 0.000 claims description 99
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- 230000008569 process Effects 0.000 claims description 46
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- 238000005229 chemical vapour deposition Methods 0.000 claims description 10
- 238000006356 dehydrogenation reaction Methods 0.000 abstract description 104
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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
- H01L29/66007—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
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- H—ELECTRICITY
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- 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
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
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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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66969—Multistep manufacturing processes of devices having semiconductor bodies not comprising group 14 or group 13/15 materials
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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を有する半導体装置の作製工程において、酸化物半導体膜と接する絶縁膜に、熱処理による脱水化又は脱水素化処理を行った後、酸素ドープ処理を行う。酸化物半導体膜と接する絶縁膜は、酸化物半導体膜下に設けられるゲート絶縁膜と、酸化物半導体膜上に設けられる保護絶縁膜として機能する絶縁膜である。ゲート絶縁膜、及び/又は絶縁膜に熱処理による脱水化又は脱水素化処理を行った後、酸素ドープ処理を行う。
【選択図】図1
Description
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2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、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3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、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5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、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6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、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7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、半導体装置の作製方法の他の一形態を説明する。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。
実施の形態1乃至7のいずれかに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又は全体を、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7のいずれかに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、テレビジョン装置(テレビ、又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、デジタルフォトフレーム、携帯電話機、携帯型ゲーム機、携帯情報端末、音響再生装置、遊技機(パチンコ機、スロットマシン等)、ゲーム筐体が挙げられる。これらの電子機器の具体例を図12に示す。
Claims (11)
- 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熱処理を行って、前記ゲート絶縁膜中の水又は水素を除去し、
前記水又は水素が除去された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することを特徴とする半導体装置の作製方法。 - 請求項1において、前記熱処理前に、前記ゲート絶縁膜に酸素ドープ処理を行うことを特徴とする半導体装置の作製方法。
- 請求項1又は請求項2において、前記酸化物半導体膜を形成後、前記ゲート絶縁膜及び前記酸化物半導体膜に熱処理を行うことを特徴とする半導体装置の作製方法。
- 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し、
前記絶縁膜に熱処理を行って、前記絶縁膜中の水又は水素を除去し、
前記水又は水素が除去された絶縁膜に酸素ドープ処理を行って、前記絶縁膜に酸素を供給することを特徴とする半導体装置の作製方法。 - 請求項4において、前記熱処理前に、前記絶縁膜に酸素ドープ処理を行うことを特徴とする半導体装置の作製方法。
- 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第1の熱処理を行って、前記ゲート絶縁膜中の水又は水素を除去し、
前記水又は水素が除去されたゲート絶縁膜に第1の酸素ドープ処理を行って、前記ゲート絶縁膜に酸素を供給し、
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し、
前記絶縁膜に第2の熱処理を行って、前記絶縁膜中の水又は水素を除去し、
前記水又は水素が除去された絶縁膜に第2の酸素ドープ処理を行って、前記絶縁膜に酸素を供給することを特徴とする半導体装置の作製方法。 - 請求項6において、前記第1の熱処理前に、前記ゲート絶縁膜に酸素ドープ処理を行うことを特徴とする半導体装置の作製方法。
- 請求項6又は請求項7において、前記第2の熱処理前に、前記絶縁膜に酸素ドープ処理を行うことを特徴とする半導体装置の作製方法。
- 請求項4乃至8のいずれか一項において、
前記ゲート絶縁膜、前記酸化物半導体膜、及び前記絶縁膜を覆う酸化アルミニウム膜を形成し、
前記ゲート絶縁膜、前記酸化物半導体膜、及び前記絶縁膜に熱処理を行うことを特徴とする半導体装置の作製方法。 - 請求項1乃至3、及び請求項6乃至8のいずれか一項において、前記ゲート絶縁膜を化学気相成長法により形成することを特徴とする半導体装置の作製方法。
- 請求項4乃至9のいずれか一項において、前記絶縁膜を化学気相成長法により形成することを特徴とする半導体装置の作製方法。
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