JP5199104B2 - 二重の閾値電圧制御手段を有する低閾値電圧の半導体デバイス - Google Patents
二重の閾値電圧制御手段を有する低閾値電圧の半導体デバイス Download PDFInfo
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- JP5199104B2 JP5199104B2 JP2008537750A JP2008537750A JP5199104B2 JP 5199104 B2 JP5199104 B2 JP 5199104B2 JP 2008537750 A JP2008537750 A JP 2008537750A JP 2008537750 A JP2008537750 A JP 2008537750A JP 5199104 B2 JP5199104 B2 JP 5199104B2
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- NWAIGJYBQQYSPW-UHFFFAOYSA-N azanylidyneindigane Chemical compound [In]#N NWAIGJYBQQYSPW-UHFFFAOYSA-N 0.000 claims description 2
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 2
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- H01L21/8232—Field-effect technology
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Thin Film Transistor (AREA)
- Electrodes Of Semiconductors (AREA)
Description
ソース及びドレイン拡散領域が内部に配置された半導体基板と、
半導体基板の上に配置されたゲートスタックであって、50%を超えるSi又はGe含有量を有する高kゲート誘電体、及び、シリコン(Si)又はゲルマニウム(Ge)含有ゲート導体を含む、ゲートスタックと、
高kゲート誘電体とSi又はGe含有ゲート導体との間に配置された絶縁中間層、ソース拡散領域とドレイン拡散領域との間に配置された工学処理されたデバイスチャネル、又はそれらの組み合わせを含む少なくとも1つの要素であって、高kゲート誘電体及び少なくとも1つの要素は、ゲートスタックの閾値電圧/フラットバンド電圧を目標値になるように安定化させる、少なくとも1つの要素と
を含む半導体構造体を提供する。
半導体基板上に構造体を準備するステップであって、構造体は、50%を超えるSi又はGe含有量を有する高kゲート誘電体、及び、Si又はGe含有ゲート導体を含むゲートスタックと、高kゲート誘電体とSi又はGe含有ゲート導体との間に配置された絶縁中間層、工学処理されたデバイスチャネル、又はそれらの組み合わせを含む少なくとも1つの要素とを含む、ステップと、
周知の手段によってゲートスタックにバイアスをかけるステップと
を含む。
Claims (10)
- 各々がソース拡散領域及びドレイン拡散領域を有するnFET領域とpFET領域とが内部に配置された半導体基板と、
前記半導体基板の前記nFET領域および前記pFET領域の各々の上に配置されたゲートスタックであって、50%を超えるSi又はGe含有量を有する高kゲート誘電体と、シリコン(Si)又はゲルマニウム(Ge)含有ゲート導体とを含む、ゲートスタックと、
前記pFET領域上の前記ゲートスタックの前記高kゲート誘電体と前記ゲート導体との間に配置された絶縁中間層であって、窒化アルミニウム(AlN)、酸窒化アルミニウム(AlO x N y )、窒化ホウ素(BN)、酸窒化ホウ素(BO x N y )、窒化ガリウム(GaN)、酸窒化ガリウム(GaON)、窒化インジウム(InN)、酸窒化インジウム(InON)、又はそれらの組み合わせを含み、前記nFET領域上の前記ゲートスタックには設けられていない、絶縁中間層と、
前記nFET領域および前記pFET領域の各々の前記ソース拡散領域と前記ドレイン拡散領域との間に配置され、カウンタードープされた領域を含むチャネル領域であって、前記カウンタードープされた領域は、その下の前記半導体基板の領域のドーパントとは反対のタイプのドーパントが10 17 原子/cm 3 から10 19 原子/cm 3 までの濃度で含まれている、チャネル領域とを備え、
前記高kゲート誘電体と前記絶縁中間層と前記チャネル領域とにより、前記pFET領域の前記ゲートスタックの閾値電圧/フラットバンド電圧が目標値になるように安定化される、半導体構造体。 - 前記半導体基板は、Si、Ge、SiGe、SiC、SiGeC、シリコン・オン・インシュレータ、シリコンゲルマニウム・オン・インシュレータ、Ga、GaAs、InAs、InP、他のIII/V族又はII/VI族化合物半導体、有機半導体、或いは積層半導体を含む、請求項1に記載の半導体構造体。
- 前記高kゲート誘電体の前記Si又はGe含有量は60%から90%までである、請求項1に記載の半導体構造体。
- 前記高kゲート誘電体は、金属シリケート、金属窒化物シリケート、金属のゲルマニウム酸塩、又は金属窒化物のゲルマニウム酸塩である、請求項1に記載の半導体構造体。
- 前記高kゲート誘電体はHfベースの材料である、請求項4に記載の半導体構造体。
- 前記絶縁中間層はAlN又はAlOxNyを含む、請求項1に記載の半導体構造体。
- 前記チャネル領域は、ハロ・イオンが注入されたハロ注入領域を含む、請求項1に記載の半導体構造体。
- 前記ゲート導体は、Si、SiGe、又はシリサイドを含む、請求項1に記載の半導体構造体。
- 前記高kゲート誘電体はHfベースの誘電体であり、前記絶縁中間層はAlN又はAlO x N y である、請求項1に記載の半導体構造体。
- 前記チャネル領域のカウンタードープされた領域は、前記半導体基板12の表面から100Åまでの範囲にある、請求項1に記載の半導体構造体。
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