KR102161445B1 - 고전자 이동도 트랜지스터 구조를 가지는 센서의 제조방법 및 이를 이용한 센서 - Google Patents
고전자 이동도 트랜지스터 구조를 가지는 센서의 제조방법 및 이를 이용한 센서 Download PDFInfo
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Abstract
Description
도 2의 (a)~(h)는 본 발명의 실시예에 따른 고전자 이동도 트랜지스터 구조를 가지는 센서의 제조 방법을 나타내는 도면이다.
도 3은 도 2의 제조 방법에 의해 제조된 고전자 이동도 트랜지스터 구조를 갖는 센서의 SEM 이미지이다.
도 4는 도 2의 제조 방법에 의해 제조된 고전자 이동도 트랜지스터 구조를 갖는 센서의 SEM 이미지이다.
Claims (19)
- 기판 상에 버퍼층을 형성하는 단계;
상기 버퍼층 상에 리프트 오프 공정을 이용하여 금속 마스크층을 형성하는 단계;
캐리어 가스를 흘리면서 상기 금속 마스크층 상에 제1 화합물 반도체를 성장시킴으로써 제1 화합물 반도체층을 형성함과 함께, 상기 금속 마스크층 하부의 상기 버퍼층 내부에는 보이드를 형성하는 단계; 및
상기 제1 화합물 반도체층 상에 상기 제1 화합물 반도체에 비해 큰 밴드갭과 작은 격자상수를 갖는 제2 화합물 반도체를 성장시킴으로써 제2 화합물 반도체층을 형성하는 단계
를 포함하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제1항에 있어서,
상기 캐리어 가스는 수소 가스 또는 수소와 질소의 혼합 가스이고,
상기 보이드는 상기 금속 마스크층 하부의 상기 버퍼층이 수소 라디컬 반응에 의해 식각됨으로써 형성되는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제1항에 있어서,
상기 보이드를 통해 질소-면(N-face)이 노출되는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제1항에 있어서,
상기 제1 화합물 반도체는, GaN이고,
상기 제2 화합물 반도체는, AlxGa1-xN(0<x≤1), InxAl1-xN(0<x≤1) 및 InxAlyGa1-x-yN(0<x≤1, 0<y≤1, 그리고 0<(x+y)≤1)으로 이루어지는 군에서 선택되는 1종인 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제1항에 있어서,
상기 금속 마스크층은 1000℃ 이상의 녹는점을 갖는 금속인 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제1항에 있어서,
상기 금속 마스크층은 텅스텐(W), 몰리브덴(Mo), 탄탈륨(Ta), 백금(Pt), 티타늄(Ti) 및 레늄(Re) 중 어느 하나로 이루어지는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제1항에 있어서,
상기 금속 마스크층의 두께는 0.1 내지 500nm인 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제1항에 있어서,
상기 금속 마스크층 상에 절연층을 추가로 포함하고,
상기 제1 화합물 반도체층은 상기 절연층 상에 형성되는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제8항에 있어서,
상기 제2 화합물 반도체층의 형성 후, 상기 금속 마스크층을 제거하는 단계;
를 더 포함하는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 제1항에 있어서,
상기 보이드가 형성된 면 상에 감지물질층을 형성하는 단계
를 더 포함하는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서의 제조 방법. - 기판 상에 형성된 버퍼층;
상기 버퍼층 상에 형성되며, 제1 화합물 반도체로 이루어지는 제1 화합물 반도체층;
상기 제1 화합물 반도체층 상에 형성되며, 상기 제1 화합물 반도체에 비해 큰 밴드갭과 작은 격자상수를 갖는 제2 화합물 반도체로 이루어지는 제2 화합물 반도체층;
상기 버퍼층의 내부의, 상기 버퍼층과 제1 화합물 반도체층의 계면에 형성되는 보이드;
상기 보이드의 내부에 형성되는 감지물질층
을 포함하는 고전자 이동도 트랜지스터 구조를 갖는 센서. - 제11항에 있어서,
상기 버퍼층과 제1 화합물 반도체층의 계면의, 상기 보이드가 형성된 부분에 형성된 금속 마스크층
을 추가로 포함하는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서. - 제11항에 있어서,
상기 보이드를 통해 질소-면(N-face)이 노출되는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서. - 제11항에 있어서,
상기 제1 화합물 반도체는, GaN이고,
상기 제2 화합물 반도체는, AlxGa1-xN(0<x≤1), InxAl1-xN(0<x≤1) 및 InxAlyGa1-x-yN(0<x≤1, 0<y≤1, 그리고 0<(x+y)≤1)으로 이루어지는 군에서 선택되는 1종인 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서. - 제12항에 있어서,
상기 금속 마스크층은 1000℃ 이상의 녹는점을 갖는 금속인 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서. - 제12항에 있어서,
상기 금속 마스크층은 텅스텐(W), 몰리브덴(Mo), 탄탈륨(Ta), 백금(Pt), 티타늄(Ti) 및 레늄(Re) 중 어느 하나로 이루어지는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서. - 제12항에 있어서,
상기 금속 마스크층의 두께는 0.1 내지 500nm인 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서. - 제12항에 있어서,
상기 금속 마스크층 상에 절연층을 추가로 포함하고,
상기 제1 화합물 반도체층은 상기 절연층 상에 형성되는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서. - 제18항에 있어서,
상기 절연층은 SiO2 또는 SiN으로 이루어지는 것을 특징으로 하는 고전자 이동도 트랜지스터 구조를 갖는 센서.
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