JP2014502045A - ナノワイヤ・デバイス及びその形成方法 - Google Patents
ナノワイヤ・デバイス及びその形成方法 Download PDFInfo
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Abstract
【解決手段】この方法は、半導体ナノワイヤ(1、10、20、30)を外周方向に囲むストレッサ層(6、13、23、33)を形成するステップを含む。この方法は、ストレッサ層によってナノワイヤが半径方向および長手方向の歪みの少なくとも一方を受けることによって、ナノワイヤ内のキャリア移動度が高くなるように行われる。半径方向および長手方向の歪み成分は別々に用いられても一緒に用いられてもよく、その各々が引っ張り歪みまたは圧縮歪みにされてもよく、所与のデバイスのナノワイヤにおける伝導率を高めるための所望の歪み特徴の構築を可能にする。
【選択図】図5
Description
Claims (16)
- ナノワイヤ・デバイス(7、14、25、38、40)を形成するための方法であって、前記方法は、半導体ナノワイヤ(1、10、20、30)を外周方向に囲むストレッサ層(6、13、23、33)を形成するステップを含み、前記方法は、前記ストレッサ層によって前記ナノワイヤが半径方向および長手方向の歪みの少なくとも一方を受けることによって、前記ナノワイヤ内のキャリア移動度が高くなるように行われる、方法。
- 半導体材料の前記ナノワイヤ(1、10、20、30)を形成するステップを含む、請求項1に記載の方法。
- 半金属材料の前記ナノワイヤを形成するステップを含み、前記ストレッサ層によって誘導される前記歪みが前記半金属材料を半導体にする、請求項1に記載の方法。
- 前記ナノワイヤ(1、20、30)にストレスを加えるように固有に適合された材料の前記ストレッサ層(6、23、33)を形成するステップを含む、請求項1から3のいずれか1項に記載の方法。
- 前記ナノワイヤ(10)上に予備層(11)を形成し、次いで前記予備層(11)を処理して前記予備層を活性化することにより前記ナノワイヤにストレスを加えることによって、前記ストレッサ層(13)を形成するステップを含む、請求項1から3のいずれか1項に記載の方法。
- 前記予備層(11)を処理するステップの前に、前記処理中に前記予備層の外表面ジオメトリを実質的に維持するために前記予備層の上に固定層(12)を形成するステップを含む、請求項5に記載の方法。
- 前記ナノワイヤの各端部が支持(3、4、21、22、31、32)に取り付けられるように前記ナノワイヤ(1、20、30)を形成するステップと、次いで前記ストレッサ層(6、23、33)を形成するステップとを含む、請求項1から6のいずれか1項に記載の方法。
- 前記ナノワイヤの少なくとも一方の端部において前記ナノワイヤ(20、30)を前記支持(22、31、32)から自由にすることによって、前記ナノワイヤが前記ストレッサ層(23、33)によって少なくとも長手方向歪みを受けるステップを含む、請求項7に記載の方法。
- 前記ナノワイヤの一方の端のみが支持に取り付けられるように前記ナノワイヤを形成するステップと、次いで前記ストレッサ層を形成することによって、前記ナノワイヤが前記ストレッサ層によって少なくとも長手方向歪みを受けるステップとを含む、請求項1から6のいずれか1項に記載の方法。
- 前記ナノワイヤ(20、30)の前記端部または各自由端に取り付けられる新たな支持(24、36、37)を形成するステップを含む、請求項8または9に記載の方法。
- 前記ナノワイヤ(20、30)から前記ストレッサ層(23、33)を除去することによって、前記ストレッサ層によるあらゆる半径方向歪みが排除されるステップを含む、請求項10に記載の方法。
- 前記ストレッサ層(6、13、23、33)を実質的に均質なコーティングとして形成するステップを含む、請求項1から11のいずれか1項に記載の方法。
- 丸い断面を有する前記ナノワイヤ(1、10、20、30)を形成するステップを含む、請求項1から12のいずれか1項に記載の方法。
- ナノワイヤ・トランジスタ(40)を形成するための方法であって、前記方法は、誘電体(44)およびゲート電極(45)を含み、かつ前記ナノワイヤ(41)のチャネル部分を囲むゲート構造を形成するステップと、前記ナノワイヤのそれぞれの端部にソースおよびドレイン領域(42、43)を提供するステップとを含む、請求項1から13のいずれか1項に記載の方法。
- ナノワイヤ・デバイス(7、14)であって、ナノワイヤを外周方向に囲むストレッサ層(6、13)を有する半導体ナノワイヤ(1、10)を含み、前記配置は、前記ナノワイヤが前記ストレッサ層によって半径方向および長手方向の歪みの少なくとも一方を受けることによって、前記ナノワイヤ内のキャリア移動度が高くなるようにする、ナノワイヤ・デバイス。
- ナノワイヤ(41)およびゲート構造を含む電界効果トランジスタ(FET)(40)であって、前記ゲート構造は誘電体(44)およびゲート電極(45)を含み、かつ前記ナノワイヤ(41)のチャネル部分を囲んでおり、前記FETはさらに、前記ナノワイヤのそれぞれの端部にソースおよびドレイン領域(42、43)を含み、前記ナノワイヤが半径方向および長手方向の歪みの少なくとも一方を受けることによって、前記ナノワイヤ内のキャリア移動度が高くなる、FET。
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PCT/IB2011/054864 WO2012066444A1 (en) | 2010-11-17 | 2011-11-02 | Strained nanowire devices |
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