JP5064766B2 - せん断応力を加えるための、半導体表面から異なる深さに誘電体ストレッサ要素を有するトランジスタ - Google Patents
せん断応力を加えるための、半導体表面から異なる深さに誘電体ストレッサ要素を有するトランジスタ Download PDFInfo
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- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823807—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the channel structures, e.g. channel implants, halo or pocket implants, or channel materials
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Description
104:活性半導体領域
106:分離領域
120:ゲート
121、321:ゲート導体
122、222:ソース領域
123:スペーサ
124:ドレイン領域
132、182:チャネル領域
150、252、350、372:表面誘電体ストレッサ要素
152、250、352、374:埋込み誘電体ストレッサ要素
162:基板
170:NFET
200、300、360:FET
400、408、410:マスキング層
415:トレンチ
Claims (15)
- 主面と、前記主面から該主面より下方の第1の深さまで延びる厚さとを有する活性半導体領域と、
全てが前記活性半導体領域内に配置されたチャネル領域、ソース領域、及びドレイン領域を有する電界効果トランジスタ(「FET」)であって、前記チャネル領域の長さが、該活性半導体領域の長手方向に配向され、該チャネル領域の幅が、前記長手方向を横断する該活性半導体領域の横断方向に配向された、電界効果トランジスタ(「FET」)と、
前記活性半導体領域の第1の縁部に横方向に隣接し、該活性半導体領域の前記主面から、前記第1の深さより実質的に深くない深さまで下方に延びる、第1の誘電体ストレッサ要素と、
前記第1の縁部の反対側にある前記活性半導体領域の第2の縁部において該活性半導体領域の一部だけの下にあり、前記第1の深さで水平方向に延びる上面を有し、前記上面から遠ざかる方向に延びる縁部を該活性半導体領域と共有する、第2の誘電体ストレッサ要素と
を備え、
前記第1の誘電体ストレッサ要素は、第1方向の第1応力を前記チャネル領域に加え、前記第2の誘電体ストレッサ要素は、前記第1方向と反対の第2方向の第2応力を前記チャネル領域に加え、前記第1応力及び前記第2応力が、協働してせん断応力を前記チャネル領域に加える、チップ。 - 前記第1の誘電体ストレッサ要素は、圧縮応力を前記第1方向にかけ、前記第2の誘電体ストレッサ要素は、圧縮応力を前記第2方向にかける、請求項1に記載のチップ。
- 前記第1の誘電体ストレッサ要素は、引張応力を前記第1方向にかけ、前記第2の誘電体ストレッサ要素は、引張応力を前記第2方向にかける、請求項1に記載のチップ。
- 前記活性半導体領域は、前記活性半導体領域の長手方向において、西縁部と、前記西縁部から離れた東縁部とを有し、かつ、該活性半導体領域の横断方向において、北縁部と、前記北縁部から離れた南縁部とを有し、前記第2の誘電体ストレッサ要素は、トレンチ分離領域と接触し、前記トレンチ分離領域は、前記北縁部、前記東縁部、前記南縁部、及び前記西縁部の少なくとも1つを該活性半導体領域と共有する、請求項1に記載のチップ。
- 前記第2の誘電体ストレッサ要素の前記縁部は、前記第2の誘電体ストレッサ要素の前記上面から遠ざかる方向に延びる、請求項1に記載のチップ。
- 前記FETは、前記チャネル領域の上にあり、垂直配向に配向された第1のゲート縁部と、前記第1のゲート縁部の反対側にある垂直方向に配向された第2のゲート縁部とをもつ導電性部分を有するゲート導体をさらに含み、前記第2の誘電体ストレッサ要素の前記縁部は、前記トレンチ分離領域と前記第2のゲート縁部との間の概略中間に配置される、請求項4に記載のチップ。
- 前記活性半導体領域の前記北縁部及び前記南縁部、並びに前記東縁部の各々が、前記トレンチ分離領域と共有され、前記第2の誘電体ストレッサ要素は、該北縁部及び該南縁部の全長より実質的に少なく接触しており、前記第1の誘電体ストレッサ要素は、前記活性半導体領域の該西縁部を分離するように働く、請求項4に記載のチップ。
- 西縁部、東縁部、北縁部、及び南縁部を有し、前記西縁部と前記東縁部との間の方向の長手方向と、前記北縁部と前記南縁部との間の方向の横断方向とをもち、主面と、前記主面から該主面より下方の第1の深さまで延びる厚さとを有する、活性半導体領域と、
全てが前記活性半導体領域内に配置されたチャネル領域、ソース領域、及びドレイン領域を有する電界効果トランジスタ(「FET」)であって、前記チャネル領域の長さは前記長手方向に配置され、該チャネル領域の幅は前記横断方向に配置される、電界効果トランジスタ(「FET」)と、
前記活性半導体領域の前記北縁部、前記南縁部、前記東縁部、又は前記西縁部の少なくとも1つを含む第1の縁部に横方向に隣接して配置され、該活性半導体領域の前記主面から、前記第1の深さより実質的に深くない深さまで延びる、第1の誘電体ストレッサ要素と、
前記活性半導体領域の前記北縁部、前記南縁部、前記東縁部、又は前記西縁部の少なくとも1つを含み、前記第1の縁部から離れた第2の縁部の下にあり、前記第1の深さで水平方向に延びる上面を有し、前記上面から遠ざかる方向に延びる第3の縁部を該活性半導体領域と共有する、第2の誘電体ストレッサ要素と
を備え、
前記第1の誘電体ストレッサ要素は、第1方向の第1応力を前記チャネル領域に加え、前記第2の誘電体ストレッサ要素は、前記第1方向と反対の第2方向の第2応力を前記チャネル領域に加え、前記第1応力及び第2応力が協働して、せん断応力を前記チャネル領域に加える、チップ。 - 前記第1の誘電体ストレッサ要素は、圧縮応力を前記第1方向にかけ、前記第2の誘電体ストレッサ要素は、圧縮応力を前記第2方向にかける、請求項8に記載のチップ。
- 前記第1の誘電体ストレッサ要素は、引張応力を前記第1方向にかけ、前記第2の誘電体ストレッサ要素は、引張応力を前記第2方向にかける、請求項8に記載のチップ。
- 電界効果トランジスタ(「FET」)デバイスを製造する方法であって、
基板の水平方向に延びる活性半導体領域の一部の主面より下方の第1の深さに上面を有する水平方向に延びる埋込み多孔質半導体領域であって、多数のボイドと、前記埋込み多孔質半導体領域を形成するプロセスのパラメータによって選択される第1の密度を有し、前記第1の密度は、前記活性半導体領域の第2の密度より実質的に低いものである、埋込み多孔質半導体領域を形成するステップと、
前記主面から前記埋込み多孔質半導体領域の反対側にある前記活性半導体領域の側で前記第1の深さより実質的に深くない第2の深さまで延び、第1の半導体を含み、多数のボイド及び前記第1の密度を有する、表面多孔質半導体領域を形成するステップと、
前記埋込み多孔質半導体領域及び前記表面多孔質半導体領域内に含まれる第1の半導体を酸化させ、埋込み誘電体ストレッサ要素及び表面誘電体ストレッサ要素をそれぞれ形成するステップと、
全てが前記活性半導体領域内に配置されたチャネル領域、ソース領域、及びドレイン領域を有する電界効果トランジスタ(「FET」)を形成するステップと
を含み、
前記埋込み誘電体ストレッサ要素及び前記表面誘電体ストレッサ要素は、前記FETの前記チャネル領域上に圧縮応力又は引張応力のいずれかを加え、前記多孔質半導体領域の前記第1の密度は、前記応力が圧縮応力であるか又は引張応力であるかを決定し、該埋込み誘電体ストレッサ要素及び該表面誘電体ストレッサ要素によって加えられる前記応力が協働してせん断応力を該FETの前記チャネル領域に加える、方法。 - 前記埋込み多孔質半導体領域及び前記表面多孔質半導体領域を形成する前記ステップは、マスク内の開口部を通してドーパントを前記基板の領域内に注入するステップと、該基板を陽極酸化プロセスにさらすステップとを含む、請求項11に記載の半導体デバイスを製造する方法。
- 前記埋込み多孔質半導体領域及び前記表面多孔質半導体領域を形成する前記ステップは、該埋込み多孔質半導体領域及び該表面多孔質半導体領域内の前記ドーパントの濃度を減少させるためのプレベーク・プロセスをさらに含む、請求項12に記載の半導体デバイスを製造する方法。
- 前記注入するステップが行われるとき、前記埋込み多孔質半導体領域を形成する際に前記ドーパントが注入される前記半導体基板の前記領域は、前記活性半導体領域の下にある、請求項12に記載の半導体デバイスを製造する方法。
- 前記埋込み誘電体ストレッサ要素の前記縁部は、前記半導体基板の前記領域に注入する前記ステップの際にフォトリソグラフィにより決定される、請求項12に記載の半導体デバイスを製造する方法。
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US11/164,373 US7476938B2 (en) | 2005-11-21 | 2005-11-21 | Transistor having dielectric stressor elements at different depths from a semiconductor surface for applying shear stress |
US11/164373 | 2005-11-21 |
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US7348638B2 (en) * | 2005-11-14 | 2008-03-25 | International Business Machines Corporation | Rotational shear stress for charge carrier mobility modification |
US7600207B2 (en) * | 2006-02-27 | 2009-10-06 | Synopsys, Inc. | Stress-managed revision of integrated circuit layouts |
US8035168B2 (en) | 2006-02-27 | 2011-10-11 | Synopsys, Inc. | Elevation of transistor channels to reduce impact of shallow trench isolation on transistor performance |
US7484198B2 (en) * | 2006-02-27 | 2009-01-27 | Synopsys, Inc. | Managing integrated circuit stress using dummy diffusion regions |
US7767515B2 (en) * | 2006-02-27 | 2010-08-03 | Synopsys, Inc. | Managing integrated circuit stress using stress adjustment trenches |
US8362622B2 (en) * | 2009-04-24 | 2013-01-29 | Synopsys, Inc. | Method and apparatus for placing transistors in proximity to through-silicon vias |
US8453100B2 (en) * | 2010-09-01 | 2013-05-28 | International Business Machines Corporation | Circuit analysis using transverse buckets |
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US6717216B1 (en) * | 2002-12-12 | 2004-04-06 | International Business Machines Corporation | SOI based field effect transistor having a compressive film in undercut area under the channel and a method of making the device |
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US7566482B2 (en) * | 2003-09-30 | 2009-07-28 | International Business Machines Corporation | SOI by oxidation of porous silicon |
US7221024B1 (en) * | 2005-10-27 | 2007-05-22 | International Business Machines Corporation | Transistor having dielectric stressor elements for applying in-plane shear stress |
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