KR101036253B1 - 결정 결함 성장이 억제되는 바이폴러 반도체 소자 - Google Patents
결정 결함 성장이 억제되는 바이폴러 반도체 소자 Download PDFInfo
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Abstract
Description
Claims (26)
- 순방향 동작에서의 적층 결함 성장(stacking fault growth)을 제어하는 바이폴러 구조물(bipolar structure)로서,전압 차단 영역; 상기 전압 차단 영역 상의 일측에 형성된 p형 경계 영역; 및 상기 전압 차단 영역 상의 상기 p형 경계 영역의 반대측에 형성된 n형 경계 영역을 포함하되, 상기 전압 차단 영역은, 상기 전압 차단 영역을 형성하는 층 또는 층들의 두께 및 도핑을 규정하는 역 차단 전압을 가지며,상기 전압 차단 영역은 상기 각각의 경계 영역보다 낮은 도핑 농도를 가지며,상기 p형 경계 영역과 상기 n형 경계 영역 중 하나 이상은 경계 영역 내에서의 소수 캐리어 확산 길이보다 큰 두께를 가짐으로써, 상기 경계 영역 내에서 소수 캐리어의 수명이 종료되어, 캐리어 결합에 의해 진행하는 적층 결함 성장이 상기 경계 영역을 넘어서 확장되는 것을 방해 또는 방지하도록 하는, 바이폴러 구조물.
- 제1항에 있어서,상기 n형 경계 영역은 실리콘 카바이드로 이루어지는 n+ 영역이고,상기 전압 차단 영역은 상기 n+ 영역 상에 실리콘 카바이드로 이루어지는 n- 전압 차단 영역이며,상기 p형 경계 영역은 상기 n- 영역 상에 있고,상기 n형 경계 영역, 상기 전압 차단 영역 및 상기 p형 경계 영역은 전체로서 p-n 다이오드로 동작하는, 바이폴러 구조물.
- 제2항에서,상기 전압 차단 영역, 상기 p형 경계 영역 및 n형 경계 영역은 실리콘 카바이드로 이루어지고,상기 전압 차단 영역, 상기 p형 경계 영역 및 n형 경계 영역 모두는 3C, 4H, 6H, 및 15R 폴리타입으로 이루어지는 군에서 선택된 동일한 폴리타입을 갖는 것을 특징으로 하는 바이폴러 구조물.
- 제2항에서,상기 n+ 영역은 2.5 미크론(㎛)의 두께와, 1 × 1018 ㎝-3과 1 × 1019 ㎝-3 사이의 캐리어 농도를 갖는 것을 특징으로 하는 바이폴러 구조물.
- 제2항에서,상기 n+ 영역은 0.5 미크론의 두께와, 2 × 1018 ㎝-3의 캐리어 농도를 갖는 것을 특징으로 하는 바이폴러 구조물.
- 제2항에서,상기 p형 경계 영역은 0.5 미크론보다 큰 두께와, 1 × 1017 ㎝-3과 1 × 1019 ㎝-3 사이의 캐리어 농도를 갖는 것을 특징으로 하는 바이폴러 구조물.
- 제2항에서,상기 p형 경계 영역은 상기 n- 영역보다 2 차수(orders of magnitude) 큰 캐리어 농도를 갖는 것을 특징으로 하는 바이폴러 구조물.
- 제2항에서,상기 p형 경계 영역 상에 형성되고, 상기 p형 경계 영역보다 캐리어 농도가 더 높은 p형 접촉 층을 더 포함하는 것을 특징으로 하는 바이폴러 구조물.
- 제8항에서,상기 접촉 층은 적어도 1 × 1019 ㎝-3의 캐리어 농도를 갖되, 상기 다이오드의 성능을 저하시키는 결정 품질의 저하를 초래하는 양보다 적으며, 적어도 1000옹스트롱(Å)의 두께를 갖는 것을 특징으로 하는 바이폴러 구조물.
- 제2항에서,실리콘 카바이드 기판을 더 포함하되, 상기 기판은 5 × 1018 ㎝-3과 2 × 1019 ㎝-3 사이의 캐리어 농도와, 적어도 125 미크론의 두께를 갖는 것을 특징으로 하는 바이폴러 구조물.
- 제2항에서,상기 p형 경계 영역 상에 형성되며, 2 미크론의 두께와, 1 × 1019 ㎝-3의 캐리어 농도를 갖는 p+ 형 접촉 층을 더 포함하고,상기 n+ 형 영역은, 2 미크론의 두께와, 1 × 1019 ㎝-3의 캐리어 농도를 갖는, 바이폴러 구조물.
- 순방향 동작에서의 적층 결함 성장을 제어하는 바이폴러 소자로서,전압 차단 영역; 상기 전압 차단 영역을 각각 경계짓는 p형 실리콘 카바이드 경계 영역 및 n형 실리콘 카바이드 경계 영역; 및 상기 경계 영역들과 상기 소자의 나머지 부분 사이의 계면(interfaces)을 포함하며,상기 전압 차단 영역은 상기 각각의 경계 영역보다 낮은 도핑 농도를 가지며,상기 p형 실리콘 카바이드 경계 영역과 상기 n형 실리콘 카바이드 경계 영역은 각각 층 내의 소수 캐리어 확산 길이보다 두꺼운 두께를 가지며,상기 계면은 두 개별 에피택셜 층간의 경계, 소자의 활성 영역과 비활성 부분간의 경계, 동일한 애피택셜 층의 주입 부분(implanted)과 비주입 부분(non-implanted) 사이의 경계, 및 물질계(material system) 또는 물질 성장 모드의 변화가 일어난 소자의 부분으로 이루어지는 군에서 선택되며,순방향 바이어스 동작 하에서 성장하는 상기 소자 내의 적층 결함 부분은 상기 경계 영역들과 상기 소자의 나머지 부분 사이에 적어도 하나의 계면으로부터 격리되어 있는, 바이폴러 소자.
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- 실리콘 카바이드계의 바이폴러 소자로서,기판;상기 기판에 인접한 제1 에피택셜 층;상기 제1 에피택셜 층 상의 전압 차단 영역;오믹 접촉부; 및상기 오믹 접촉부에 인접한 제2 에피택셜 층을 포함하되,상기 기판은 125㎛ 이상의 두께와 5 × 1018 ㎝-3과 2 × 1019 ㎝-3 사이의 캐리어 농도를 가지며,상기 제1 에피택셜 층과 상기 제2 에피택셜 층의 각각의 두께는 각 층에서의 소수 캐리어 확산 길이보다 두꺼운 것을 특징으로 하는, 바이폴러 소자.
- 삭제
- 제18항에서,상기 제1 에피택셜 층은 n형 층을 포함하고, 상기 제2 에피택셜 층은 p형 층을 포함하며,상기 제1 에피택셜 층, 제2 에피택셜 층 및 상기 기판 모두는 실리콘 카바이드의 3C, 4H, 6C, 및 15R 폴리타입으로 이루어지는 군으로부터 선택된 동일한 폴리타입을 갖는 것을 특징으로 하는 바이폴러 소자.
- 제18항에 있어서,상기 바이폴러 소자는 p-n 접합 다이오드, p-i-n 다이오드, 바이폴러 트랜지스터 및 사이리스터로 이루어진 군으로부터 선택된 어느 하나인 것을 특징으로 하는 바이폴러 소자.
- 제18항에서,적어도 하나의 적층 결함을 포함하며,순방향 바이어스 동작 하에서 성장하는 상기 적층 결함 부분은 상기 바이폴러 소자의 활성 영역과 상기 바이폴러 소자의 나머지 부분 사이의 적어도 하나의 계면으로부터 격리되어 있는 것을 특징으로 하는 바이폴러 소자.
- 제18항에서,적어도 하나의 적층 결함을 포함하며,상기 적층 결함은 상기 소자의 순방향 바이어스 동작 하에서 상기 적층 결함의 성장을 유지하기에 충분한 결함 밀도 또는 응력 상태를 갖는 상기 소자의 소정 부분으로부터 격리되어 있는 것을 특징으로 하는 바이폴러 소자.
- 삭제
- 삭제
- 삭제
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US10/046,346 US6849874B2 (en) | 2001-10-26 | 2001-10-26 | Minimizing degradation of SiC bipolar semiconductor devices |
US10/046,346 | 2001-10-26 |
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US (4) | US6849874B2 (ko) |
EP (1) | EP1438739B1 (ko) |
JP (1) | JP4597514B2 (ko) |
KR (1) | KR101036253B1 (ko) |
CN (1) | CN100369196C (ko) |
CA (1) | CA2457399A1 (ko) |
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US20050118746A1 (en) | 2005-06-02 |
WO2003038876A1 (en) | 2003-05-08 |
US7427326B2 (en) | 2008-09-23 |
EP1438739B1 (en) | 2019-06-26 |
JP2005508086A (ja) | 2005-03-24 |
EP1438739A1 (en) | 2004-07-21 |
US7880171B2 (en) | 2011-02-01 |
CN1559080A (zh) | 2004-12-29 |
CA2457399A1 (en) | 2003-05-08 |
JP4597514B2 (ja) | 2010-12-15 |
TWI229421B (en) | 2005-03-11 |
US6849874B2 (en) | 2005-02-01 |
US20050116234A1 (en) | 2005-06-02 |
KR20050030239A (ko) | 2005-03-29 |
CN100369196C (zh) | 2008-02-13 |
US20070117336A1 (en) | 2007-05-24 |
US20030080842A1 (en) | 2003-05-01 |
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