KR101831186B1 - 코플라나 형태의 산화물 박막트랜지스터 및 그 제조 방법과, 이를 이용한 표시패널 및 표시장치 - Google Patents
코플라나 형태의 산화물 박막트랜지스터 및 그 제조 방법과, 이를 이용한 표시패널 및 표시장치 Download PDFInfo
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Abstract
Description
도 2는 본 발명에 따른 표시장치의 구성을 나타낸 예시도.
도 3은 본 발명에 따른 코플라나 형태의 산화물 박막트랜지스터의 일실시예 단면도.
도 4 내지 도 7은 본 발명에 따른 코플라나 형태의 산화물 박막트랜지스터의 제조 방법을 나타낸 예시도들.
도 8은 본 발명에 따른 코플라나 형태의 산화물 박막트랜지스터의 제1도체부 및 제2도체부가 형성되는 방법을 나타낸 예시도.
도 9는 본 발명에 따른 코플라나 형태의 산화물 박막트랜지스터의 소자 특성과 본 발명과 유사한 구조를 가지나 자외선이 조사되지 않은 코플라나 형태의 산화물 박막트랜지스터의 소자 특성을 비교한 그래프.
도 10은 본 발명에 따른 코플라나 형태의 산화물 박막트랜지스터에 자외선이 조사되는 기간과 전류와의 관계를 나타낸 그래프.
도 11은 본 발명에 따른 코플라나 형태의 산화물 박막트랜지스터에 자외선이 조사되는 기간과 홀 이동도 및 캐리어 집중도와의 관계를 나타낸 그래프.
200: 게이트 드라이버 300: 데이터 드라이버
400: 제어부
Claims (11)
- 버퍼 상단에 구비되며, 산화물로 구성된 채널;
상기 채널과 상기 버퍼를 커버하는 게이트 절연막;
상기 게이트 절연막 상단에 구비되며, 상기 채널 중 산화물 반도체로 구성된 액티브 영역과 중첩되는 게이트; 및
상기 게이트와 상기 게이트 절연막을 커버하는 보호막을 포함하며,
상기 채널 중 상기 게이트와 중첩되는 영역의 저항과, 상기 중첩되는 영역 이외의 저항이 서로 다른 코플라나 형태의 산화물 박막트랜지스터. - 제 1 항에 있어서,
상기 액티브 영역의 일측 끝단에 구비되고, 상기 액티브 영역보다 작은 저항을 갖는 제1도체부는 제1전극과 연결되며,
상기 채널 중 상기 액티브 영역의 타측 끝단에 구비되고, 상기 액티브 영역보다 작은 저항을 갖는 제2도체부는 제2전극과 연결되는 코플라나 형태의 산화물 박막트랜지스터. - 제 2 항에 있어서,
상기 제1도체부는 상기 산화물 반도체를 구성하는 금속과 동일한 종류의 금속을 포함하고, 상기 제1도체부에 구비된 상기 금속은 산소가 빠져나간 빈공간 및 자유전자를 가지며,
상기 제2도체부는 상기 산화물 반도체를 구성하는 금속과 동일한 종류의 금속을 포함하고, 상기 제2도체부에 구비된 상기 금속은 산소가 빠져나간 빈공간 및 자유전자를 갖는 코플라나 형태의 산화물 박막트랜지스터. - 제 2 항에 있어서,
상기 제1도체부와 상기 게이트 절연막의 경계영역에는, 상기 산화물 반도체를 구성하는 금속과 동일한 종류의 금속이, 산화수소(OH)와 결합하여 생성된 제1금속막이 구비되며,
상기 제2도체부와 상기 게이트 절연막의 경계영역에는, 상기 산화물 반도체를 구성하는 금속과 동일한 종류의 금속이, 산화수소(OH)와 결합하여 생성된 제2금속막이 구비되는 코플라나 형태의 산화물 박막트랜지스터. - 게이트 펄스가 공급되는 게이트 라인들;
데이터 전압이 공급되는 데이터 라인들; 및
상기 게이트 라인들과 상기 데이터 라인들에 의해 정의되는 픽셀들을 포함하며,
상기 픽셀들 각각에는 제 1 항 내지 제 4 항 중 어느 하나에 기재된 코플라나 형태의 산화물 박막트랜지스터가 구비되어 있는 표시패널. - 제 5 항에 있어서,
상기 코플라나 형태의 산화물 박막트랜지스터는 상기 픽셀들이 구비되어 있는 표시영역의 외곽의 비표시영역에도 구비되어 있는 표시패널. - 제 5 항에 기재된 표시패널;
상기 표시패널에 구비된 게이트 라인들로 게이트 펄스를 공급하는 게이트 드라이버;
상기 표시패널에 구비된 데이터 라인들로 데이터 전압을 공급하는 데이터 드라이버; 및
상기 게이트 드라이버와 상기 데이터 드라이버를 제어하는 제어부를 포함하는 표시장치. - 기판에 버퍼를 층착하는 단계;
상기 버퍼에 산화물 반도체로 구성된 채널을 생성하는 단계;
게이트 절연막을 증착하여 상기 채널과 상기 버퍼를 커버하는 단계;
상기 게이트 절연막에, 상기 채널의 일부와 중첩되는 게이트를 증착하는 단계; 및
자외선을 조사하여, 상기 채널 중 상기 게이트와 중첩되지 않는 영역을 도체화시키는 단계를 포함하는 코플라나 형태의 산화물 박막트랜지스터 제조 방법. - 제 8 항에 있어서,
보호막을 증착하여 상기 게이트 절연막과 상기 게이트를 커버하는 단계; 및
상기 채널 중 상기 게이트와 중첩되는 액티브 영역의 일측 끝단에 구비되고, 상기 자외선에 의해 도체화된 제1도체부를 상기 보호막에 형성된 컨택홀을 통해 제1전극과 연결시키며, 상기 채널 중 상기 게이트와 중첩되는 액티브 영역의 타측 끝단에 구비되고, 상기 자외선에 의해 도체화된 제2도체부를 상기 보호막에 형성된 또 다른 컨택홀을 통해 제2전극과 연결시키는 단계를 더 포함하는 코플라나 형태의 산화물 박막트랜지스터 제조 방법. - 제 8 항에 있어서,
상기 자외선을 조사하는 과정과 동시에 또는 상기 자외선을 조사한 이후에, 상기 채널에 열을 가하는 단계를 더 포함하는 코플라나 형태의 산화물 박막트랜지스터 제조 방법. - 제 8 항에 있어서,
상기 기판에 버퍼를 증착하기 전에, 상기 기판에 상기 채널과 중첩되는 라이트 쉴드를 증착하는 단계를 더 포함하는 코플라나 형태의 산화물 박막트랜지스터 제조 방법.
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US15/391,636 US10396099B2 (en) | 2016-06-30 | 2016-12-27 | Coplanar type oxide thin film transistor, method of manufacturing the same, and display panel and display device using the same |
EP16207507.1A EP3264468A1 (en) | 2016-06-30 | 2016-12-30 | Coplanar type oxide thin film transistor, method of manufacturing the same, and display panel and display device using the same |
CN201611270971.3A CN107564949B (zh) | 2016-06-30 | 2016-12-30 | 氧化物tft、其制造方法、使用其的显示面板和显示装置 |
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KR102546780B1 (ko) | 2018-12-28 | 2023-06-21 | 엘지디스플레이 주식회사 | 두께 차를 갖는 액티브층을 포함하는 박막 트랜지스터 및 이를 포함하는 표시장치 |
CN110416225A (zh) * | 2019-07-24 | 2019-11-05 | 深圳市华星光电半导体显示技术有限公司 | 一种TFT驱动背板及Micro-LED显示器 |
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US20180006056A1 (en) | 2018-01-04 |
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