JP2018041979A - 非平面ゲルマニウム量子井戸デバイス - Google Patents
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Abstract
Description
上述のように、典型的にIII−V族材料系のエピタキシャル成長半導体ヘテロ構造内に形成された量子井戸トランジスタデバイスは、低い有効質量と変調デルタドーピングによる抑制された不純物散乱とによって、トランジスタチャネルに非常に高いキャリア移動度をもたらす。これらの従来デバイスは非常に高い駆動電流性能を提供する。このような量子井戸システムは典型的に、プレーナアーキテクチャを用いて製造される。
図1は、本発明の一実施形態に係る非平面ゲルマニウム量子井戸デバイスを製造するのに使用され得るGe量子井戸成長構造の一例の断面図を示している。量子井戸成長構造は、例えば、従来の、キャップ層を備えたSiGe/Ge又はGaAs/Ge量子井戸構造とし得る。しかしながら、上述のように、本発明の一実施形態に従って形成される変調/デルタドープ非平面Ge量子井戸トランジスタデバイスは、この開示を受けて明らかになるように、様々なIV族若しくはIII−V族材料、ドーピング層及びバッファ層で構成される如何なる数の量子井戸成長構造を用いて実現されてもよい。請求項記載発明は、何らかの特定の量子井戸成長構成に限定されるものではない。
図2−8は、本発明の一実施形態に従って構成されるGeフィンに基づく量子井戸構造の形成を示す断面図及び斜視図である。認識されるように、フィンに基づく構造は、図1に示したデバイススタックの上、又はアンドープのGeチャネルを有する他の何らかの変調/デルタドープ量子井戸成長構造の上に形成されることができる。なお、明示的には説明しないが、この形成プロセス全体を通して、例えば平坦化(例えば、化学機械研磨すなわちCMP)及びその後の洗浄処理などの中間プロセスが含められ得る。
図9は、本発明の一実施形態に係る、ゲルマニウムフィンベースの変調/デルタドープ量子井戸構造を形成する方法を示している。量子井戸構造は、所望のように構成されることができ、概して、基板、IV/III−V族バリア層、(変調/デルタドープされた)ドーピング層、及び量子井戸層を含んだスタック(積層体)を含む。
Claims (20)
- 頂面と、該頂面の反対側の底面と、該頂面と該底面との間の両側の側壁とを持つゲルマニウムのボディであり、当該ゲルマニウムのボディの前記底面が、ゲルマニウムよりも高いバンドギャップを持つ第1の半導体材料上にあり、当該ゲルマニウムのボディは圧縮歪みを含んでいる、ゲルマニウムのボディと、
前記ゲルマニウムのボディの前記頂面及び前記側壁と接触した第2の半導体材料であり、ゲルマニウムよりも高いバンドギャップを持つ第2の半導体材料と、
前記第2の半導体材料の少なくとも一部を覆うゲート構造であり、当該ゲート構造は、ゲート電極及びゲート誘電体を有し、前記ゲート誘電体は、前記ゲート電極と前記第2の半導体材料との間にあり、前記ゲート誘電体は、前記第2の半導体材料とは別個であり且つ前記第2の半導体材料と接触している、ゲート構造と、
を有する半導体デバイス。 - 前記第2の半導体材料は基本的に、シリコン、又はシリコンとゲルマニウム、から成る、請求項1に記載のデバイス。
- 前記第1の半導体材料は、1つ以上の層を含んだ半導体構造の一部であり、前記半導体構造の第1の側壁が、第1のアイソレーション領域と隣接し、前記半導体構造の第2の側壁が、第2のアイソレーション領域と隣接し、前記第1及び第2のアイソレーション領域は各々、上面及び下面を有する、請求項1に記載のデバイス。
- 前記半導体構造は、1つ以上の傾斜された半導体部分を含む、請求項3に記載のデバイス。
- 前記ゲート電極及び前記ゲート誘電体の少なくとも一方が、前記第1のアイソレーション領域の前記上面上及び前記第2のアイソレーション領域の前記上面上にあり、前記第1のアイソレーション領域の前記下面及び前記第2のアイソレーション領域の前記下面は、前記半導体構造上にある、請求項3に記載のデバイス。
- 前記半導体構造は、p型不純物又はn型不純物を含有する領域を含む、請求項3に記載のデバイス。
- 前記p型不純物又は前記n型不純物に加えて、前記第1の半導体材料は基本的にシリコン及びゲルマニウムから成る、請求項6に記載のデバイス。
- 前記第1の半導体材料は、III−V族化合物半導体を有する、請求項1に記載のデバイス。
- 前記III−V族化合物半導体は、ガリウム、ヒ素、インジウム、及びアルミニウムのうちの少なくとも2つを含む、請求項8に記載のデバイス。
- ソース領域又はドレイン領域を更に含む請求項1に記載のデバイス。
- 前記ゲート構造の第1の側に隣接するソース領域と、前記ゲート構造の第2の側に隣接するドレイン領域と、を更に含む請求項1に記載のデバイス。
- 前記ゲート誘電体は、high−kゲート誘電体材料を有し、前記ゲート電極は、前記high−kゲート誘電体材料上にある、請求項1に記載のデバイス。
- シリコン基板を更に有する請求項1に記載のデバイス。
- 各々が上面と反対側の下面とを持つ第1のアイソレーション領域及び第2のアイソレーション領域と、
頂面と、該頂面の反対側の底面と、該頂面と該底面との間の両側の側壁とを持つゲルマニウムフィンであり、当該ゲルマニウムフィンの前記底面が、ゲルマニウムよりも高いバンドギャップを持つ第1の半導体材料上にあり、前記第1の半導体材料は、1つ以上の層を含んだ半導体構造の一部であり、前記半導体構造の第1の側壁が、前記第1のアイソレーション領域と隣接し、前記半導体構造は、p型不純物又はn型不純物を含有する領域を含む、ゲルマニウムフィンと、
前記ゲルマニウムフィンの前記頂面及び前記側壁と接触した第2の半導体材料であり、ゲルマニウムよりも高いバンドギャップを持つ第2の半導体材料と、
前記第2の半導体材料の少なくとも一部を覆うゲート構造であり、当該ゲート構造は、ゲート電極及びゲート誘電体を有し、前記ゲート誘電体は、前記ゲート電極と前記第2の半導体材料との間にあり、前記ゲート誘電体は、high−kゲート誘電体材料を有し、前記第2の半導体材料とは別個であり、且つ前記第2の半導体材料と接触しており、前記ゲート電極は、前記high−kゲート誘電体材料上にあり、前記ゲート電極及び前記ゲート誘電体の少なくとも一方が、前記第1のアイソレーション領域の前記上面上及び前記第2のアイソレーション領域の前記上面上にあり、前記第1のアイソレーション領域の前記下面及び前記第2のアイソレーション領域の前記下面は、前記半導体構造上にある、ゲート構造と、
を有する集積回路。 - 前記第2の半導体材料は基本的に、シリコン、又はシリコンとゲルマニウム、から成る、請求項14に記載の集積回路。
- 前記半導体構造は、1つ以上の傾斜された部分を含む、請求項14に記載の集積回路。
- 前記p型不純物又は前記n型不純物に加えて、前記第1の半導体材料は基本的にシリコン及びゲルマニウムから成る、請求項14に記載の集積回路。
- 前記第1の半導体材料は、III−V族化合物半導体を有する、請求項14に記載の集積回路。
- 前記III−V族化合物半導体は、ガリウム、ヒ素、インジウム、及びアルミニウムのうちの少なくとも2つを含む、請求項18に記載の集積回路。
- シリコン基板を更に有する請求項14に記載の集積回路。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/646,477 | 2009-12-23 | ||
| US12/646,477 US8283653B2 (en) | 2009-12-23 | 2009-12-23 | Non-planar germanium quantum well devices |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015207296A Division JP6301301B2 (ja) | 2009-12-23 | 2015-10-21 | 非平面ゲルマニウム量子井戸デバイス |
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| Publication Number | Publication Date |
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| JP2018041979A true JP2018041979A (ja) | 2018-03-15 |
| JP6549208B2 JP6549208B2 (ja) | 2019-07-24 |
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| JP2012543132A Pending JP2013513250A (ja) | 2009-12-23 | 2010-11-18 | 非平面ゲルマニウム量子井戸デバイス |
| JP2015207296A Active JP6301301B2 (ja) | 2009-12-23 | 2015-10-21 | 非平面ゲルマニウム量子井戸デバイス |
| JP2017229213A Expired - Fee Related JP6549208B2 (ja) | 2009-12-23 | 2017-11-29 | 非平面ゲルマニウム量子井戸デバイス |
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| JP2012543132A Pending JP2013513250A (ja) | 2009-12-23 | 2010-11-18 | 非平面ゲルマニウム量子井戸デバイス |
| JP2015207296A Active JP6301301B2 (ja) | 2009-12-23 | 2015-10-21 | 非平面ゲルマニウム量子井戸デバイス |
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| US (6) | US8283653B2 (ja) |
| EP (2) | EP2517256B1 (ja) |
| JP (3) | JP2013513250A (ja) |
| KR (1) | KR101378661B1 (ja) |
| CN (3) | CN105870168A (ja) |
| WO (1) | WO2011087570A1 (ja) |
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| EP2517256A1 (en) | 2012-10-31 |
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| CN105870168A (zh) | 2016-08-17 |
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| JP6549208B2 (ja) | 2019-07-24 |
| JP6301301B2 (ja) | 2018-03-28 |
| KR101378661B1 (ko) | 2014-03-26 |
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| EP2996154A2 (en) | 2016-03-16 |
| CN104900693A (zh) | 2015-09-09 |
| WO2011087570A1 (en) | 2011-07-21 |
| US20110147711A1 (en) | 2011-06-23 |
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