JP2012049286A - 半導体装置の製造方法 - Google Patents
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Abstract
【解決手段】 シリコン基板1の表面上に加工によりシリコンFin部11を形成した後、該シリコンFin部の側壁及び上部の平面部へドナーもしくはアクセプターとなる不純物原子を含む不純物薄膜を、堆積膜として上部の平面部には厚く、側壁には薄く堆積する工程と、前記シリコンFin部における前記堆積膜の斜め上方から斜め方向のイオン注入と反対側の斜め上方から斜め方向のイオン注入を行なうとともに、該イオン注入によって、前記不純物原子を堆積膜内部からシリコン基板の前記シリコンFin部の側壁内部及び上部の平面部内にリコイルして導入させる工程と、を含む。
【選択図】 図1
Description
以上のように本発明の実施形態によれば、プラズマによる堆積薄膜とイオン注入によるリコイル(ノッキングオン効果)作用により、立体的構造物の壁と上部の平面部のすべてに均一に不純物を導入することができる。
2、2’ 堆積膜
3、3’、4 不純物拡散層
5 イオンビーム
6、16 絶縁層
11 シリコンFin部
12 ハードマスク
Claims (20)
- 半導体装置の基体となる半導体基板の表面上に加工により側壁部及び上部の平面部を有する立体凹凸部分を形成した該半導体基板において、
該半導体基板の内部においてドナーもしくはアクセプターとなる不純物原子を含む不純物薄膜を、半導体基板の表面上に堆積する工程により、立体凹凸部分の側壁部に比べて立体凹凸部分の上部の平面部には前記不純物薄膜を厚く堆積させ、
更に、立体凹凸部分の前記堆積させた不純物薄膜の斜め上方から斜め方向のイオン注入と反対側の斜め上方から斜め方向のイオン注入を行なうとともに、
該イオン注入によって、前記不純物原子を不純物薄膜内部から半導体基板の立体凹凸部分の側壁部及び上部の平面部の内部にリコイルさせる工程を含むことを特徴とする半導体装置の製造方法。 - 前記立体凹凸部分の側壁部と上部の平面部との堆積厚さ比率の調節により、立体凹凸部分の側壁部と上部の平面部への不純物導入比率を調節するよう構成したことを特徴とする請求項1に記載の半導体装置の製造方法。
- イオン注入の斜め上方からの斜め方向の注入角度の調節により、立体凹凸部分の側壁部と上部の平面部への不純物導入比率を調節するよう構成したことを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記立体凹凸部分の側壁部と上部の平面部との堆積厚さ比率の調節、及び、イオン注入の斜め上方からの斜め方向の注入角度の調節により、立体凹凸部分の側壁部と上部の平面部への不純物導入比率を調節するよう構成したことを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記立体凹凸部分の側壁部と上部の平面部との堆積厚さ比率の調節、及び、イオン注入の斜め上方からの斜め方向の注入角度の調節により、立体凹凸部分の側壁部と上部の平面部に実質上2対1の比率で不純物が導入される構成としたことを特徴とする請求項1に記載の半導体装置の製造方法。
- 一方の斜め上方からのイオン注入及び反対側の斜め上方からのイオン注入による両注入により、立体凹凸部分の側壁部と上部の平面部に実質上同じ量の不純物を導入するよう構成したことを特徴とする請求項5に記載の半導体装置の製造方法。
- 前記立体凹凸部分の側壁部と上部の平面部の堆積厚さ比率は、前記上部の平面部の堆積厚さが前記立体凹凸部分の側壁部の堆積厚さの少なくとも2倍以上であることを特徴とする請求項3〜5のいずれか1項に記載の半導体装置の製造方法。
- 前記不純物薄膜の、側壁膜厚、及び上部の平面部膜厚、不純物堆積物質種の設定調整、前記イオン注入の、注入イオン種、注入角度、注入エネルギー、注入ドーズ量の設定調整により、リコイル条件、注入ドーズ量相当のドーズ原子量をコントロールするよう構成したことを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記不純物薄膜の不純物原子をB、P、Asのいずれか1つとすることを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記不純物薄膜として、ジボランB2H6、あるいはBF3を含むガスによるプラズマ処理によって、Bを含む不純物薄膜を堆積することを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記不純物薄膜として、フォスフィンPH3を含むガスによるプラズマ処理によって、Pを含む不純物薄膜を堆積することを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記不純物薄膜として、アルシンAsH3を含むガスによるプラズマ処理によって、Asを含む不純物薄膜を堆積することを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記イオン注入工程において、注入イオンを、前記不純物薄膜の不純物原子であるB,P,Asのいずれかよりも原子量の大きい、重い原子のイオンとすることを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記イオン注入工程において、注入イオンを、Si、As、Ge、In、Sb若しくはXe、Arのいずれか1つとすることを特徴とする請求項1に記載の半導体装置の製造方法。
- 半導体基板の前記立体凹凸部分の表面に対する前記イオン注入の斜め上方からのビーム入射角度を実質上20°以下の傾斜角度とすることを特徴とする請求項8に記載の半導体装置の製造方法。
- 半導体基板の前記立体凹凸部分の表面部分において、前記不純物薄膜内から前記半導体基板内に、前記不純物薄膜の不純物原子を、表面と実質上直交する方向において、注入イオンによる不純物原子への衝突たたき込みノッキングオン効果により表面内部にリコイルさせることを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記イオン注入を5keV以下の低エネルギー注入とすることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記イオン注入を2E15cm-2以下の低ドーズ注入原子量とすることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記半導体基板表面上であって前記立体凹凸部分以外の表面上の平面の部分に、前記不純物薄膜を厚く堆積することを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記プラズマ処理によって堆積する不純物薄膜の前記立体凹凸部分以外の半導体基板平面での堆積レートは大きく、前記立体凹凸部分側面での堆積レートを前記半導体基板平面より小さくすることにより前記半導体基板平面に厚く不純物薄膜を堆積することを特徴とする請求項10〜12のいずれか1項に記載の半導体装置の製造方法。
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SG2011061314A SG178705A1 (en) | 2010-08-26 | 2011-08-24 | Manufacturing method of semiconductor device |
KR1020110084271A KR101897649B1 (ko) | 2010-08-26 | 2011-08-24 | 반도체장치의 제조방법 |
US13/217,679 US9023720B2 (en) | 2010-08-26 | 2011-08-25 | Manufacturing method of semiconductor device |
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US9299840B2 (en) | 2013-03-08 | 2016-03-29 | Taiwan Semiconductor Manufacturing Company, Ltd. | FinFETs and methods for forming the same |
EP3316285A1 (en) | 2016-10-28 | 2018-05-02 | Renesas Electronics Corporation | Semiconductor device and method of manufacturing the semiconductor device |
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US9214345B2 (en) * | 2012-02-09 | 2015-12-15 | Nissan Chemical Industries, Ltd. | Film-forming composition and ion implantation method |
KR102047097B1 (ko) | 2012-10-25 | 2019-11-20 | 삼성전자주식회사 | 반도체 장치의 제조방법 |
KR102018101B1 (ko) | 2013-02-04 | 2019-11-14 | 삼성전자 주식회사 | 반도체 소자 및 이의 제조 방법 |
KR102175854B1 (ko) | 2013-11-14 | 2020-11-09 | 삼성전자주식회사 | 반도체 소자 및 이를 제조하는 방법 |
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US9558946B2 (en) | 2014-10-03 | 2017-01-31 | Taiwan Semiconductor Manufacturing Company, Ltd. | FinFETs and methods of forming FinFETs |
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CN107437506B (zh) * | 2016-05-27 | 2020-08-07 | 中芯国际集成电路制造(上海)有限公司 | 半导体结构的形成方法 |
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US10964799B2 (en) | 2013-03-08 | 2021-03-30 | Taiwan Semiconductor Manufacturing Company, Ltd. | FinFETs and methods for forming the same |
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Also Published As
Publication number | Publication date |
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KR101897649B1 (ko) | 2018-10-04 |
TWI544521B (zh) | 2016-08-01 |
EP2423953A1 (en) | 2012-02-29 |
SG178705A1 (en) | 2012-03-29 |
US9023720B2 (en) | 2015-05-05 |
US20120052664A1 (en) | 2012-03-01 |
TW201230157A (en) | 2012-07-16 |
KR20120020062A (ko) | 2012-03-07 |
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