JP5829457B2 - 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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- JP5829457B2 JP5829457B2 JP2011177794A JP2011177794A JP5829457B2 JP 5829457 B2 JP5829457 B2 JP 5829457B2 JP 2011177794 A JP2011177794 A JP 2011177794A JP 2011177794 A JP2011177794 A JP 2011177794A JP 5829457 B2 JP5829457 B2 JP 5829457B2
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- oxide semiconductor
- oxide
- insulating film
- semiconductor film
- film
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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
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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
- H01L29/66742—Thin film unipolar transistors
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02164—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon oxide, e.g. SiO2
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/34—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies not provided for in groups H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
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- H01L21/461—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/428 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
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- H01L21/34—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies not provided for in groups H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
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- H01L22/10—Measuring as part of the manufacturing process
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- H01L29/401—Multistep manufacturing processes
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4908—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET for thin film semiconductor, e.g. gate of TFT
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- H01L29/66409—Unipolar field-effect transistors
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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Description
図1は、半導体装置の構成の一形態であるトランジスタの作製工程を示す断面図であり、図2の一点破線A−Bの断面図は図1(E)に相当する。
本実施の形態では、実施の形態1と異なる構造のトランジスタの作製方法について、図3及び図4を用いて説明する。本実施の形態では、酸化物絶縁膜及び酸化物半導体膜の間に一対の電極が設けられる点が実施の形態1と異なる。なお、図4の一点破線A−Bの断面図は図3(D)に相当する。
本実施の形態では、実施の形態1及び実施の形態2と比較して、酸化物半導体膜及び一対の配線の接触抵抗を低減できるトランジスタの作製方法について、図1及び図5を用いて説明する。
本実施の形態では、オン電流及び電界効果移動度を高めることが可能なトランジスタ、またはしきい値電圧を制御することができるトランジスタについて、図6を用いて説明する。
本実施の形態では、実施の形態1乃至実施の形態4と比較して、さらに酸化物半導体膜中の水素濃度を低減する方法について、説明する。本実施の形態では実施の形態1を用いて説明するが、適宜実施の形態2乃至実施の形態4に適応することができる。
実施の形態1乃至5に示したトランジスタを作製し、該トランジスタを画素部、さらには駆動回路に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、トランジスタを用いた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。
本明細書に開示する半導体装置は、電子ペーパーとして適用することができる。電子ペーパーは、情報を表示するものであればあらゆる分野の電子機器に用いることが可能である。例えば、電子ペーパーを用いて、電子書籍(電子ブック)、ポスター、デジタルサイネージ、PID(Public Information Display)、電車などの乗り物の車内広告、クレジットカード等の各種カードにおける表示等に適用することができる。電子機器の一例を図7に示す。
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、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。
53 酸化物絶縁膜
55 酸化物半導体膜
57 酸化物半導体膜
59 酸化物半導体膜
61 電極
63 ゲート絶縁膜
65 ゲート電極
69 絶縁膜
71 電極
73 酸化物半導体膜
75 酸化物半導体膜
77 ゲート絶縁膜
79 ゲート電極
81 絶縁膜
83 配線
84 バッファ
85 バッファ
87 バッファ
91 ゲート電極
93 ゲート絶縁膜
95 酸化物半導体膜
97 酸化物半導体膜
99 酸化物半導体膜
101 電極
103 ゲート絶縁膜
105 ゲート電極
109 絶縁膜
111 基板
113 酸化物絶縁膜
115 酸化物半導体膜
117 酸化物半導体膜
201 破線
203 実線
205 破線
207 実線
209 破線
211 実線
221 曲線
223 曲線
2700 電子書籍
2701 筐体
2703 筐体
2705 表示部
2706 光電変換装置
2707 表示部
2708 光電変換装置
2711 軸部
2721 電源
2723 操作キー
2725 スピーカ
9600 テレビジョン装置
9601 筐体
9603 表示部
9605 スタンド
9607 表示部
9609 操作キー
9610 リモコン操作機
9700 デジタルフォトフレーム
9701 筐体
9703 表示部
Claims (5)
- 基板上に酸化物絶縁膜を形成し、
前記酸化物絶縁膜上に酸化物半導体膜を形成し、
前記酸化物半導体膜を形成した後、加熱処理を行い、
前記加熱処理を行った後、前記酸化物半導体膜の一部をエッチングして、島状の酸化物半導体膜を形成し、
前記島状の酸化物半導体膜上に一対の電極を形成し、
前記島状の酸化物半導体膜上及び前記一対の電極上にゲート絶縁膜を形成し、
前記ゲート絶縁膜上に、前記島状の酸化物半導体膜と重畳する領域を有するゲート電極を形成し、
前記加熱処理において、前記酸化物半導体膜に含まれる水素が脱離し、前記酸化物絶縁膜に含まれる酸素の一部が脱離して、前記酸化物半導体膜と前記酸化物絶縁膜との界面近傍、及び前記酸化物半導体膜に拡散することを特徴とする半導体装置の作製方法。 - 基板上に酸化物絶縁膜を形成し、
前記酸化物絶縁膜上に一対の電極を形成し、
前記一対の電極上に酸化物半導体膜を形成し、
前記酸化物半導体膜を形成した後、加熱処理を行い、
前記加熱処理を行った後、前記酸化物半導体膜の一部をエッチングして、島状の酸化物半導体膜を形成し、
前記一対の電極上及び前記島状の酸化物半導体膜上にゲート絶縁膜を形成し、
前記ゲート絶縁膜上に、前記島状の酸化物半導体膜と重畳する領域を有するゲート電極を形成し、
前記加熱処理において、前記酸化物半導体膜に含まれる水素が脱離し、前記酸化物絶縁膜に含まれる酸素の一部が脱離して、前記酸化物半導体膜と前記酸化物絶縁膜との界面近傍、及び前記酸化物半導体膜に拡散することを特徴とする半導体装置の作製方法。 - 請求項1または請求項2において、
前記酸化物絶縁膜において、前記加熱処理によって脱離する酸素の脱離量は、昇温脱離ガス分光法分析を用いて、酸素原子として換算すると、1.0×1018atoms/cm3以上であることを特徴とする半導体装置の作製方法。 - 請求項1または請求項2において、
前記酸化物絶縁膜として、化学量論比より多くの酸素を含む酸化物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。 - 請求項1乃至請求項4のいずれか一項において、
前記加熱処理は、150℃以上前記基板の歪み点未満で行うことを特徴とする半導体装置の作製方法。
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