KR100927505B1 - n-채널 DMOS 트랜지스터 소스 구조체 및 측방 DMOS 트랜지스터의 제조 방법 - Google Patents
n-채널 DMOS 트랜지스터 소스 구조체 및 측방 DMOS 트랜지스터의 제조 방법 Download PDFInfo
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Abstract
Description
도 1은 본 발명의 LDMOS 트랜지스터의 표본적인 실시예의 개념적 단면도.
Claims (15)
- 금속화부(metallization)에 오믹 접속되어 있는 n-형 소스 영역(diffusion);상기 소스 영역의 적어도 일부를 측방으로(laterally) 둘러싸고 있는 p-형 표면 보디;상기 p-형 표면 보디의 일부에 용량적으로 결합되어 그 내부에 채널 영역을 규정하는 게이트;상기 채널 및 상기 게이트, 및 상기 표면 보디의 적어도 일부의 아래에 위치하고 있는 p형 매립 보디; 및상기 매립 보디와 상기 금속화부 사이의 오믹 접속을 포함하며,상기 매립 보디는 정공 전류가 상기 소스 영역을 우회하도록 전환시켜, 2차 전자의 방출을 감소시키는 n-채널 DMOS 트랜지스터 소스 구조체.
- 제1항에 있어서,드리프트 영역에 의해 상기 p-형 표면 보디로부터 측방으로 분리되어 있는 드레인 영역을 더 포함하는 n-채널 DMOS 트랜지스터 소스 구조체.
- 금속화부에 오믹 접속되어 있는 n-형 소스 영역;상기 소스 영역의 적어도 일부를 측방으로 둘러싸고 있는 p-형 표면 보디;상기 p-형 표면 보디의 일부에 용량적으로 결합되어 그 내부에 채널 영역을 규정하는 게이트;상기 채널, 및 상기 표면 보디의 적어도 일부의 아래에 위치하고 있는 p형 매립 보디 - 상기 매립 보디는 상기 소스 영역의 적어도 일부에 자기 정렬(self-align)되어 있음 - ; 및상기 매립 보디와 상기 금속화부 사이의 오믹 접속을 포함하며,상기 매립 보디는 정공 전류가 상기 소스 영역을 우회하도록 전환(divert)시켜 2차 전자의 방출을 감소시키는 n-채널 DMOS 트랜지스터 소스 구조체.
- 제3항에 있어서,드리프트 영역에 의해 상기 채널 영역으로부터 측방으로 분리되어 있는 드레인 영역을 더 포함하는 n-채널 DMOS 트랜지스터 소스 구조체.
- 삭제
- n-형 소스 영역;상기 소스 영역의 적어도 일부를 측방으로 둘러싸고 있는 p-형 표면 보디;상기 p-형 표면 보디의 일부에 용량적으로 결합되어, 그 내부에 채널 영역을 규정하는 게이트; 및적어도 일부의 정공 전류가, 상기 표면 보디를 적어도 부분적으로 우회하도록 전환시키는 p-형 매립 보디를 포함하는 n-채널 DMOS 트랜지스터 소스 구조체.
- 제6항에 있어서,드리프트 영역에 의해 상기 채널 영역으로부터 측방으로 이격되어 있어, 측방 DMOS 트랜지스터를 규정하는 드레인 영역을 더 포함하는 n-채널 DMOS 트랜지스터 소스 구조체.
- 제6항에 있어서,상기 매립 보디는 상기 소스 영역의 적어도 일부에 자기 정렬되어 있는 n-채널 DMOS 트랜지스터 소스 구조체.
- 제6항에 있어서,n+ 드레인을 측방으로 둘러싸고 있는 적어도 하나의 얕은 n-웰 확산을 포함하고, 드리프트 영역에 의해 상기 채널 영역으로부터 측방으로 이격되어 있어 측방 DMOS 트랜지스터를 규정하는 드레인 구조체를 더 포함하는 n-채널 DMOS 트랜지스터 소스 구조체.
- 금속화부에 저항적으로 접속되어 있는 n-형 소스 영역;상기 소스 영역의 적어도 일부를 측방으로 둘러싸고 있는 p-형 표면 보디;상기 p-형 표면 보디의 일부에 용량적으로 결합되어, 그 내부에 채널 영역을 규정하는 게이트;상기 채널 및 상기 표면 보디의 적어도 일부의 아래에 위치하고 있는 p-형 매립 보디; 및상기 매립 보디 및 상기 금속화부 사이의 저항을 감소시키는 적어도 하나의 추가적인 저 저항 경로를 포함하고,상기 매립 보디는 정공 전류를 전환시켜 기생 바이폴라의 턴온을 회피함으로써, 소자의 안전 동작 영역을 증가시키는 n-채널 DMOS 트랜지스터 소스 구조체.
- 제10항에 있어서,드리프트 영역에 의해 상기 채널 영역으로부터 측방으로 이격되어 있어, 측방 DMOS 트랜지스터를 규정하는 드레인 영역을 더 포함하는 n-채널 DMOS 트랜지스터 소스 구조체.
- 제10항에 있어서,상기 매립 보디는 상기 소스 영역의 적어도 일부에 자기 정렬되어 있는 n-채널 DMOS 트랜지스터 소스 구조체.
- 측방 DMOS 트랜지스터의 제조 방법에 있어서,반도체 층 상에 제1 도전형의 제1 영역을 형성하는 단계;상기 제1 영역 내에 매립 보디 영역을 형성하는 단계;상기 제1 영역에 대향하는 제2 도전형의 소스 영역으로서, 상기 보디가 소스 영역의 근방에 있도록 형성되고, 상기 소스 영역의 에지와 상기 제1 영역의 에지 사이에 채널 영역이 형성되도록 소스 영역을 형성하는 단계;상기 반도체 층 내에 상기 채널 영역에 인접하는 제2 도전형의 드레인 영역을 형성하는 단계; 및상기 채널 영역의 적어도 일부분에 걸쳐 연장되어 있는 적어도 하나의 게이트를 형성하는 단계를 포함하는 측방 DMOS 트랜지스터의 제조 방법.
- 제13항에 있어서,상기 매립 보디 영역을 형성하는 단계는, 상기 제1 영역에 자기 정렬되는 고 에너지 임플란트로서 수행되는 측방 DMOS 트랜지스터의 제조 방법.
- 제13항에 있어서,상기 매립 보디 영역은, 에피텍셜 층(epitaxial layer) 성장 단계에 선행하는 도펀트(dopant) 도입 단계에 의해 형성되는 측방 DMOS 트랜지스터의 제조 방법.
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