KR101437274B1 - 화합물 반도체 장치 및 그 제조 방법 - Google Patents
화합물 반도체 장치 및 그 제조 방법 Download PDFInfo
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Abstract
화합물 반도체 장치의 일 양태에는, 기판(11)과, 기판(11) 상방에 형성된 전자 주행층(15) 및 전자 공급층(17)과, 전자 공급층(17) 상방에 형성된 게이트 전극(19g), 소스 전극(19s) 및 드레인 전극(19d)이 형성되어 있다. 또한, 기판(11)과 전자 주행층(15)과의 사이에서, 또한 평면에서 보아 게이트 전극(19g)과 겹치는 영역에 위치하고, Fe가 도핑되어 게이트 전극(19g) 하방의 2차원 전자 가스(100)를 억제하는 Fe 도핑층(14)이 형성되어 있다.
Description
도 2는 제1 실시 형태의 특성을 나타내는 도면.
도 3a는 제1 실시 형태에 따른 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 3b는 도 3a에 이어서, 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 3c는 도 3b에 이어서, 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 3d는 도 3c에 이어서, 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 4는 제2 실시 형태에 따른 화합물 반도체 장치의 구조를 나타내는 단면도.
도 5a는 제2 실시 형태에 따른 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 5b는 도 5a에 이어서, 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 5c는 도 5b에 이어서, 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 6은 제3 실시 형태에 따른 화합물 반도체 장치의 구조를 나타내는 단면도.
도 7a는 제3 실시 형태에 따른 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 7b는 도 7a에 이어서, 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 7c는 도 7b에 이어서, 화합물 반도체 장치의 제조 방법을 공정순으로 나타내는 단면도.
도 8은 제4 실시 형태에 따른 디스크리트 패키지를 도시하는 도면.
도 9는 제5 실시 형태에 따른 PFC 회로를 도시하는 결선도.
도 10은 제6 실시 형태에 따른 전원 장치를 도시하는 결선도.
도 11은 제7 실시 형태에 따른 고주파 증폭기를 도시하는 결선도.
14 : 2DEG 억제층
15 : 전자 주행층
17 : 전자 공급층
19g : 게이트 전극
19s : 소스 전극
19d : 드레인 전극
31 : 트랩 억제층
Claims (10)
- 기판과,
상기 기판 상방에 형성된 전자 주행층 및 전자 공급층과,
상기 전자 공급층 상방에 형성된 게이트 전극, 소스 전극 및 드레인 전극과,
상기 기판과 상기 전자 주행층과의 사이에서, 또한 상기 전자 주행층에서 상기 기판 방향으로 바라본 평면에서 보아 상기 게이트 전극과 겹치는 영역에 위치하고, Fe가 도핑되어 상기 게이트 전극 하방의 2차원 전자 가스를 억제하는 Fe 도핑층과,
상기 기판과 상기 전자 주행층과의 사이에서, Fe가 상기 Fe 도핑층보다도 저농도로 도핑된 제2 Fe 도핑층을 갖는 것을 특징으로 하는 화합물 반도체 장치. - 제1항에 있어서,
상기 Fe 도핑층에, 1×1017㎝-3 이상의 농도로 Fe가 도핑되어 있는 것을 특징으로 하는 화합물 반도체 장치. - 제1항 또는 제2항에 있어서,
상기 Fe 도핑층은, GaN층인 것을 특징으로 하는 화합물 반도체 장치. - 제1항 또는 제2항에 있어서,
상기 제2 Fe 도핑층은 상기 Fe 도핑층보다도 상기 소스 전극측에 위치하는 것을 특징으로 하는 화합물 반도체 장치. - 제4항에 있어서,
상기 제2 Fe 도핑층에, 1×1017㎝-3 미만의 농도로 Fe가 도핑되어 있는 것을 특징으로 하는 화합물 반도체 장치. - 제1항 또는 제2항에 있어서,
상기 기판과 상기 전자 주행층과의 사이에서, 또한 상기 Fe 도핑층보다도 상기 드레인 전극측에 위치하고, Fe가 상기 Fe 도핑층보다도 저농도로 도핑된 제3 Fe 도핑층을 갖는 것을 특징으로 하는 화합물 반도체 장치. - 제6항에 있어서,
상기 제3 Fe 도핑층에, 1×1017㎝-3 미만의 농도로 Fe가 도핑되어 있는 것을 특징으로 하는 화합물 반도체 장치. - 제1항 또는 제2항에 기재된 화합물 반도체 장치를 갖는 것을 특징으로 하는 전원 장치.
- 제1항 또는 제2항에 기재된 화합물 반도체 장치를 갖는 것을 특징으로 하는 고출력 증폭기.
- 기판 상방에 전자 주행층 및 전자 공급층을 형성하는 공정과,
상기 전자 공급층 상방에 게이트 전극, 소스 전극 및 드레인 전극을 형성하는 공정을 갖고,
상기 전자 주행층을 형성하는 공정 전에, 상기 기판 상방에, 상기 전자 주행층에서 상기 기판 방향으로 바라본 평면에서 보아 상기 게이트 전극과 겹치는 영역에 위치하고, Fe가 도핑되어 상기 게이트 전극 하방의 2차원 전자 가스를 억제하는 Fe 도핑층과, 상기 기판과 상기 전자 주행층과의 사이에서, Fe가 상기 Fe 도핑층보다도 저농도로 도핑된 제2 Fe 도핑층을 형성하는 공정을 갖는 것을 특징으로 하는 화합물 반도체 장치의 제조 방법.
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