KR102676341B1 - 박막 트랜지스터, 그의 제조방법, 및 그를 포함한 표시장치 - Google Patents
박막 트랜지스터, 그의 제조방법, 및 그를 포함한 표시장치 Download PDFInfo
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Abstract
Description
도 2는 Sn(Ⅳ)O2와 Sn(Ⅱ)O의 깁스 자유 에너지를 보여주는 표이다.
도 3은 본 발명의 일 실시 예에 따른 표시장치를 보여주는 사시도이다.
도 4는 도 3의 제1 기판, 게이트 구동부, 소스 드라이브 IC, 연성필름, 회로보드, 및 타이밍 제어부를 보여주는 평면도이다.
도 5는 CMOS 회로를 보여주는 회로도이다.
도 6은 본 발명의 제1 실시예에 따른 제1 및 제2 박막 트랜지스터들을 보여주는 단면도이다.
도 7은 주기율표를 보여주는 표이다.
도 8은 본 발명의 제1 실시예에 따른 제1 및 제2 박막 트랜지스터들의 제조방법을 보여주는 흐름도이다.
도 9a 내지 도 9e는 본 발명의 제1 실시예에 따른 제1 및 제2 박막 트랜지스터들의 제조방법을 설명하기 위한 단면도들이다.
도 10a 내지 도 10d는 반응성 금속층을 형성하지 않은 경우와 반응성 금속층을 티타늄으로 형성하고 200℃ 또는 300℃로 열처리한 경우, 액티브층을 XPS 분석한 결과를 보여주는 그래프와 표이다.
도 11a 내지 도 11d는 반응성 금속층을 형성하지 않은 경우와 반응성 금속층을 탄탈륨으로 형성하고 200℃ 또는 300℃로 열처리한 경우, 액티브층을 XPS 분석한 결과를 보여주는 그래프와 표이다.
도 12는 본 발명의 제2 실시예에 따른 제1 및 제2 박막 트랜지스터들을 보여주는 단면도이다.
도 13은 본 발명의 제3 실시예에 따른 제1 및 제2 박막 트랜지스터들을 보여주는 단면도이다.
도 14는 본 발명의 제4 실시예에 따른 제1 및 제2 박막 트랜지스터들을 보여주는 단면도이다.
도 15는 본 발명의 제4 실시예에 따른 제1 및 제2 박막 트랜지스터들의 제조방법을 보여주는 흐름도이다.
도 16a 내지 도 16d는 본 발명의 제4 실시예에 따른 제1 및 제2 박막 트랜지스터들의 제조방법을 설명하기 위한 단면도들이다.
도 17은 본 발명의 제5 실시예에 따른 제1 및 제2 박막 트랜지스터들을 보여주는 단면도이다.
도 18은 본 발명의 제6 실시예에 따른 제1 및 제2 박막 트랜지스터들을 보여주는 단면도이다.
도 19는 본 발명의 제7 실시예에 따른 제1 및 제2 박막 트랜지스터들을 보여주는 단면도이다.
도 20은 본 발명의 제8 실시예에 따른 제1 및 제2 박막 트랜지스터들을 보여주는 단면도이다.
120: 게이트 절연막 130: 제1 액티브층
140: 금속 산화물층 140': 반응성 금속층
150: 제1 소스 전극 160: 제1 드레인 전극
170: 층간 절연막 20: 박막 트랜지스터
210: 제2 게이트 전극 220: 제2 액티브층
250: 제2 소스 전극 260: 제2 드레인 전극
CT1: 제1 콘택홀 CT2: 제2 콘택홀
CT3: 제3 콘택홀 CT4: 제4 콘택홀
Claims (21)
- Sn(Ⅱ)O 기반의 산화물을 포함하는 액티브층;
상기 액티브층의 일면에 접촉하는 금속 산화물층;
상기 액티브층과 중첩되는 게이트 전극;
상기 게이트 전극과 액티브층 사이에 마련된 게이트 절연막;
상기 액티브층의 제1 측에 접촉된 소스 전극; 및
상기 액티브층의 제2 측에 접촉된 드레인 전극을 포함하며,
상기 액티브층과 상기 금속 산화물층은, 각각, Sn(Ⅳ)O2 기반의 산화물 반도체층 및 반응성 금속층이 형성된 후 상기 Sn(Ⅳ)O2 기반의 산화물 반도체층 및 상기 반응성 금속층이 열처리되어 형성된 것이고,
상기 금속 산화물층은 상기 액티브층의 하면에 마련된 것을 특징으로 하는 박막 트랜지스터. - 제 1 항에 있어서,
상기 금속 산화물층은 전기적으로 절연된 절연층인 것을 특징으로 하는 박막 트랜지스터. - 제 2 항에 있어서,
상기 금속 산화물층은 알루미늄 산화물, 티타늄 산화물, 탄탈륨 산화물, 또는 몰리브덴 티타늄 산화물으로 형성된 것을 특징으로 하는 박막 트랜지스터. - 제 1 항에 있어서,
상기 액티브층의 상면에 마련된 제2 금속 산화물층을 더 포함하는 것을 특징으로 하는 박막 트랜지스터. - 제 4 항에 있어서,
상기 소스 전극과 상기 드레인 전극은 상기 제2 금속 산화물층과 접촉하는 것을 특징으로 하는 박막 트랜지스터. - 제 5 항에 있어서,
상기 게이트 전극은 상기 액티브층의 하부에 배치되는 것을 특징으로 하는 박막 트랜지스터. - 제 4 항에 있어서,
상기 제2 금속 산화물층은 상기 액티브층의 상면 일부에 마련된 것을 특징으로 하는 박막 트랜지스터. - 제 7 항에 있어서,
상기 제2 금속 산화물층에 의해 덮이지 않은 상기 액티브층의 상면은 식각 공정에 의해 도체화된 것을 특징으로 하는 박막 트랜지스터. - 제 8 항에 있어서,
상기 소스 전극과 상기 드레인 전극은 상기 액티브층의 도체화 영역에 접촉된 것을 특징으로 하는 박막 트랜지스터. - 제 8 항에 있어서,
상기 게이트 전극은 상기 액티브층의 상부에 배치되는 것을 특징으로 하는 박막 트랜지스터. - 삭제
- 게이트 전극을 형성하고, 상기 게이트 전극을 덮는 게이트 절연막을 형성하는 단계;
상기 게이트 절연막 상에 액티브층을 형성하는 단계;
상기 액티브층 상에 반응성 금속층을 형성하는 단계;
상기 액티브층과 상기 반응성 금속층을 열처리하여, 상기 액티브층을 Sn(Ⅱ)O 기반의 산화물 반도체층으로 형성하고, 상기 반응성 금속층을 금속 산화물층으로 형성하는 단계; 및
상기 액티브층의 제1 측에 접촉하는 소스 전극과 상기 액티브층의 제2 측에 접촉하는 드레인 전극을 형성하는 단계를 포함하는 박막 트랜지스터의 제조방법. - 액티브층을 형성하는 단계;
상기 액티브층 상에 반응성 금속층을 형성하는 단계;
액티브층과 상기 반응성 금속층을 열처리하여, 상기 액티브층을 Sn(Ⅱ)O 기반의 산화물 반도체층으로 형성하고, 상기 반응성 금속층을 금속 산화물층으로 형성하는 단계;
상기 금속 산화물층을 덮는 게이트 절연층을 형성하고, 상기 게이트 절연층 상에 게이트 전극층을 형성하며, 상기 게이트 전극층과 상기 게이트 절연층을 식각하여 게이트 전극과 게이트 절연막을 형성하는 단계;
상기 게이트 전극 상에 층간 절연막을 형성하는 단계; 및
상기 층간 절연막을 관통하여 상기 액티브층을 노출하는 제1 및 제2 콘택홀들을 형성하고, 상기 제1 콘택홀을 통해 상기 액티브층의 제1 측에 접촉하는 소스 전극과 상기 제2 콘택홀을 통해 상기 액티브층의 제2 측에 접촉하는 드레인 전극을 형성하는 단계를 포함하는 박막 트랜지스터의 제조방법. - P형 반도체 특성이 있는 제1 박막 트랜지스터; 및
N형 반도체 특성이 있는 제2 박막 트랜지스터를 구비하고,
상기 제1 박막 트랜지스터는 Sn(Ⅱ)O 기반의 산화물을 갖는 제1 액티브층을 포함하며,
상기 제2 박막 트랜지스터는 Sn(Ⅳ)O2 기반의 산화물을 갖는 제2 액티브층을 포함하며,
상기 제1 박막 트랜지스터는 상기 제1 액티브층의 일면에 마련된 금속 산화물층을 더 포함하며,
상기 제1 액티브층과 상기 금속 산화물층은, 각각, Sn(Ⅳ)O2 기반의 산화물 반도체층 및 반응성 금속층이 형성된 후 상기 Sn(Ⅳ)O2 기반의 산화물 반도체층 및 상기 반응성 금속층이 열처리되어 형성된 것이고,
상기 금속 산화물층은 상기 제1 액티브층의 하면에 마련된 것을 특징으로 하는 표시장치. - 제 14 항에 있어서,
상기 제1 박막 트랜지스터는,
상기 제1 액티브층과 중첩되는 제1 게이트 전극;
상기 제1 게이트 전극과 제1 액티브층 사이에 마련된 게이트 절연막;
상기 제1 액티브층의 제1 측에 접촉된 제1 소스 전극; 및
상기 제1 액티브층의 제2 측에 접촉된 제1 드레인 전극을 더 포함하는 것을 특징으로 하는 표시장치. - 제 14 항에 있어서,
상기 제2 박막 트랜지스터는,
상기 제2 액티브층과 중첩되는 제2 게이트 전극;
상기 제2 게이트 전극과 제2 액티브층 사이에 마련된 게이트 절연막;
상기 제2 액티브층의 제1 측에 접촉된 제2 소스 전극; 및
상기 제2 액티브층의 제2 측에 접촉된 제2 드레인 전극을 포함하는 것을 특징으로 하는 표시장치. - 제 15 항에 있어서,
상기 금속 산화물층은 전기적으로 절연된 절연층인 것을 특징으로 하는 표시장치. - 제 15 항에 있어서,
상기 제1 액티브층의 상면에 마련된 제2 금속 산화물층을 더 포함하는 것을 특징으로 하는 표시장치.
- 삭제
- 삭제
- 삭제
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US15/855,053 US20180190683A1 (en) | 2016-12-30 | 2017-12-27 | Thin film transistor and method for manufacturing the same, and display device including the same |
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KR102145387B1 (ko) * | 2019-01-07 | 2020-08-18 | 한양대학교 산학협력단 | 박막 트랜지스터 및 그 제조방법 |
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US20200403011A1 (en) | 2020-12-24 |
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