KR20230000718A - 고전자이동도 트랜지스터 및 그 제조 방법 - Google Patents
고전자이동도 트랜지스터 및 그 제조 방법 Download PDFInfo
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Abstract
Description
도 2는 일 실시예에 따른 고전자이동도 트랜지스터에 대한 X선 광전자 분광(X-ray photoelectron spectroscopy; XPS) 결과를 간략하게 도시한 그래프이다.
도 3은 일 실시예에 따른 고전자이동도 트랜지스터에 대한 X선 광전자 분광(X-ray photoelectron spectroscopy; XPS) 결과를 간략하게 도시한 그래프이다.
도 4는 일 실시예에 따른 고전자이동도 트랜지스터에 대한 X선 광전자 분광(X-ray photoelectron spectroscopy; XPS) 결과를 간략하게 도시한 그래프이다.
도 5는 일 실시예에 따른 고전자이동도 트랜지스터에 대한 HTRB(High-Temperature Reverse Bias) 신뢰성 평가 결과를 간략하게 도시한 것이다.
도 6은 다른 일 실시예에 따른 고전자이동도 트랜지스터의 예시적인 구성을 간략하게 도시한 측단면도이다.
도 7은 또 다른 일 실시예에 따른 고전자이동도 트랜지스터의 예시적인 구성을 간략하게 도시한 측단면도이다.
도 8은 또 일 실시예에 따른 고전자이동도 트랜지스터의 예시적인 구성을 간략하게 도시한 측단면도이다.
도 9는 일 실시예에 따른 고전자이동도 트랜지스터 제조 방법을 설명하기 위한 흐름도이다.
도 10 내지 도 13은 도 9의 고전자이동도 트랜지스터 제조 방법을 설명하기 위한 것이다.
도 14는 다른 일 실시예에 따른 고전자이동도 트랜지스터 제조 방법을 설명하기 위한 흐름도이다.
도 15 내지 도 16은 도 14의 고전자이동도 트랜지스터 제조 방법을 설명하기 위한 것이다.
도 17은 또 다른 일 실시예에 따른 고전자이동도 트랜지스터 제조 방법을 설명하기 위한 흐름도이다.
도 18 내지 도 23은 도 17의 고전자이동도 트랜지스터 제조 방법을 설명하기 위한 것이다.
12: 씨드층
13: 버퍼층
20: 채널층
21: 2차원 전자가스
22: 디플리션 영역
30: 배리어층
40: p형 반도체층
41: p형 반도체 물질층
50: 제1 패시베이션층
60, 61: 게이트 전극
62: 게이트 전극 물질층
71: 소스 전극
72: 드레인 전극
80, 81: 제2 패시베이션층
82: 제3 패시베이션층
100, 110, 120, 130, 140, 150, 160: 고전자이동도 트랜지스터
Claims (20)
- 채널층;
상기 채널층 상에 마련되며, 상기 채널층에 2차원 전자가스(2-Dimensional Electron Gas; 2DEG)를 유발하는 배리어층;
상기 배리어층 상에 마련되는 p형 반도체층;
상기 배리어층 상에 마련되며 Al, Ga, O, N의 4성분계 물질을 포함하는 제1 패시베이션층;
상기 p형 반도체층 상에 마련되는 게이트 전극; 및
상기 배리어층의 양측에, 상기 게이트 전극으로부터 이격되게 마련되는 소스 전극 및 드레인 전극; 을 포함하는, 고전자이동도 트랜지스터. - 제1 항에 있어서,
상기 제1 패시베이션층은 AlGaOxNy(0<x<1, 0<y<1, x+y<1)를 포함하는, 고전자이동도 트랜지스터. - 제1 항에 있어서,
상기 제1 패시베이션층은 상기 배리어층의 상기 p형 반도체층이 마련되지 않은 영역 상에 마련되는, 고전자이동도 트랜지스터. - 제1 항에 있어서,
상기 제1 패시베이션층은 상기 배리어층의 상부 표면과 직접 접촉하도록 마련되는, 고전자이동도 트랜지스터. - 제1 항에 있어서,
상기 제1 패시베이션층과 상기 게이트 전극을 덮는 제2 패시베이션층; 을 더 포함하는, 고전자이동도 트랜지스터. - 제5 항에 있어서,
상기 제2 패시베이션층은 상기 제1 패시베이션층이 포함하는 물질과 다른 물질을 포함하는, 고전자이동도 트랜지스터. - 제5 항에 있어서
상기 제2 패시베이션층, 상기 소스 전극 및 드레인 전극을 덮는 제3 패시베이션층; 을 더 포함하는, 고전자이동도 트랜지스터. - 제7 항에 있어서,
상기 제2 패시베이션층과 상기 제3 패시베이션층은 각각, 상기 게이트 전극을 외부로 노출시키는 제1 홀 및 제2 홀을 포함하는, 고전자이동도 트랜지스터. - 제7 항에 있어서
상기 게이트 전극의 상기 p형 반도체층과 접하는 하부 표면의 면적은 상기 게이트 전극과 접하는 상기 p형 반도체층의 상부 표면의 면적보다 작은, 고전자이동도 트랜지스터. - 제1 항에 있어서,
상기 제1 패시베이션층의 두께는 1nm ~ 10nm인, 고전자이동도 트랜지스터. - 제1 항에 있어서,
상기 배리어층의 에너지 밴드갭은 상기 채널층의 에너지 밴드갭보다 큰, 고전자이동도 트랜지스터. - 제1 항에 있어서,
상기 배리어층은 AlGaN, AlInN, InGaN, AlN, AlInGaN 중 어느 하나를 포함하는, 고전자이동도 트랜지스터. - 기판 상에 채널층을 형성하는 단계;
상기 채널층 상에 배리어층을 형성하는 단계;
상기 배리어층 상에 p형 반도체층을 형성하는 단계;
상기 배리어층 상에 Al, Ga, O, N의 4성분계 물질을 포함하는 제1 패시베이션층을 형성하는 단계;
상기 p형 반도체층 상에 게이트 전극을 형성하는 단계; 및
상기 배리어층의 양측에, 상기 게이트 전극으로부터 이격되게 마련되는 소스 전극 및 드레인 전극을 형성하는 단계; 를 포함하는, 고전자이동도 트랜지스터 제조 방법. - 제13 항에 있어서,
상기 배리어층 상에 p형 반도체층을 형성하는 단계와 상기 p형 반도체층 상에 게이트 전극을 형성하는 단계에서는, 상기 배리어층 상에 p형 반도체 물질층과 게이트 전극 물질층을 순차적으로 형성한 뒤, 적층된 상기 p형 반도체 물질층과 상기 게이트 전극 물질층을 식각하여 상기 p형 반도체층과 상기 게이트 전극을 형성하고,
상기 제1 패시베이션층을 형성하는 단계는, 상기 p형 반도체층을 형성하는 단계 및 상기 게이트 전극을 형성하는 단계 이후에 수행되는, 고전자이동도 트랜지스터 제조 방법. - 제14 항에 있어서,
상기 제1 패시베이션층을 형성하는 단계에서는, 상기 p형 반도체 물질층과 상기 게이트 전극 물질층이 식각됨으로써 노출된 상기 배리어층에 대해, O2 플라즈마 전처리, N2O 플라즈마 전처리 및 오존(ozone) 처리 중 어느 하나를 수행함으로써 상기 제1 패시베이션층을 형성하는, 고전자이동도 트랜지스터 제조 방법. - 제14 항에 있어서,
상기 제1 패시베이션층을 형성하는 단계 이후에 상기 제1 패시베이션층과 상기 게이트 전극을 덮는 제2 패시베이션층을 형성하는 단계; 를 더 포함하는, 고전자이동도 트랜지스터 제조 방법. - 제13 항에 있어서,
상기 배리어층 상에 p형 반도체층을 형성하는 단계에서는, 상기 배리어층 상에 p형 반도체 물질층을 형성한 뒤, 증착된 상기 p형 반도체 물질층을 식각하여 상기 p형 반도체층을 형성하고,
상기 제1 패시베이션층을 형성하는 단계에서는, 상기 p형 반도체 물질층이 식각됨으로써 노출된 상기 배리어층에 대해 O2 플라즈마 전처리, N2O 플라즈마 전처리 및 오존(ozone) 처리 중 어느 하나를 수행함으로써 상기 제1 패시베이션층을 형성하는, 고전자이동도 트랜지스터 제조 방법. - 제17 항에 있어서,
상기 제1 패시베이션층을 형성하는 단계 이후 및 상기 게이트 전극을 형성하는 단계 이전에, 상기 제1 패시베이션층과 상기 p형 반도체층을 덮는 제2 패시베이션층을 형성하는 단계; 를 더 포함하는, 고전자이동도 트랜지스터 제조 방법. - 제18 항에 있어서,
상기 제2 패시베이션층을 형성하는 단계 이후 및 상기 게이트 전극을 형성하는 단계 이전에, 상기 소스 전극 및 드레인 전극을 형성하는 단계가 수행되고,
상기 소스 전극 및 드레인 전극을 형성하는 단계 이후 및 상기 게이트 전극을 형성하는 단계 이전에, 상기 소스 전극, 상기 드레인 전극 및 상기 제2 패시베이션층을 덮는 제3 패시베이션층을 형성하는 단계; 를 더 포함하는, 고전자이동도 트랜지스터 제조 방법. - 제19 항에 있어서,
상기 게이트 전극을 형성하는 단계에서는, 상기 제2 패시베이션층과 상기 제3 패시베이션층에 각각 상기 p형 반도체층을 노출시키는 제1 홀 및 제2 홀을 형성하고, 상기 제1 홀 및 제2 홀을 통해 상기 p형 반도체층과 접하는 상기 게이트 전극을 형성하는, 고전자이동도 트랜지스터 제조 방법.
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