KR20200123204A - 픽셀 크기가 축소된 마이크로디스플레이를 위한 3d 픽셀 회로 및 그 형성 방법 - Google Patents
픽셀 크기가 축소된 마이크로디스플레이를 위한 3d 픽셀 회로 및 그 형성 방법 Download PDFInfo
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Abstract
Description
도 1은 종래의 실리콘 제조 공정을 사용하여 형성된 상이한 크기의 픽셀 회로의 개략도이다.
도 2는 본 발명의 예시적인 실시예에 따른, 수직 적층형(vertically stacked) 픽셀 회로의 개략도이다.
도 3은 본 발명의 예시적인 실시예에 따른, 도 2의 수직 적층형 픽셀 회로의 회로도이다.
도 4는 본 발명의 예시적인 실시예에 따른, 도 2 및 도 3의 픽셀 회로에 대한 동작 신호 값을 나타내는 그래프이다.
도 5는 본 발명의 예시적인 실시예에 따른, 도 2 및 도 3의 픽셀 회로를 이용하는 유기발광 다이오드(OLED) 마이크로디스플레이 제조 방법의 흐름도이다.
Claims (26)
- 수직 적층형(vertically stacked) 회로로서,
적어도 하나의 저전압 트랜지스터를 포함하는 하부 영역; 및
상기 하부 영역의 위에 배치되고 적어도 하나의 고전압 트랜지스터를 포함하는 상부 영역;
을 포함하되,
상기 상부 영역 및 상기 하부 영역은 전기 접속부를 통하여 전기적으로 연결되는, 회로. - 제1항에 있어서,
상기 고전압 트랜지스터는, 3 볼트 초과의 전압에서 작동하도록 설계된 트랜지스터를 포함하는, 회로. - 제1항에 있어서,
상기 하부 영역 및 상기 상부 영역이, 각각의 실리콘 층 상에 형성되는, 회로. - 제3항에 있어서,
상기 전기 접속부는 실리콘 관통 전극(through-silicon via)을 포함하는, 회로. - 제1항에 있어서,
상기 상부 영역은 적어도 하나의 유기 발광 다이오드(OLED)를 더 포함하는, 회로. - 제1항에 있어서,
상기 회로의 길이 및 폭이 4 ㎛ x 4 ㎛ 미만인, 회로. - 수직 적층형 픽셀 회로로서,
적어도 하나의 저전압 트랜지스터를 포함하는 하부 영역; 및
상기 하부 영역의 위에 배치되고, 적어도 하나의 유기 발광 다이오드(OLED) 및 상기 적어도 하나의 OLED를 구동하도록 구성된 픽셀 구동 회로를 포함하는 상부 영역;
을 포함하되,
상기 상부 영역 및 상기 하부 영역은 전기 접속부를 통하여 전기적으로 연결되는, 픽셀 회로. - 제7항에 있어서,
상기 하부 영역은 매트릭스 어드레싱(matrix addressing) 회로, 데이터 저장 회로 및 균일도 보상(uniformity compensation) 회로를 포함하는, 픽셀 회로. - 제7항에 있어서,
상기 픽셀 구동 회로는 적어도 하나의 고전압 트랜지스터를 포함하는, 픽셀 회로. - 제8항에 있어서,
상기 매트릭스 어드레싱 회로는 선택 스위치(selection switch)를 포함하고, 상기 데이터 저장 회로는 저장 커패시터(storage capacitor)를 포함하는, 픽셀 회로. - 제10항에 있어서,
상기 저장 커패시터는 트렌치 커패시터(trench capacitor)를 포함하는, 픽셀 회로. - 제7항에 있어서,
상기 하부 영역 및 상기 상부 영역이, 각각의 실리콘 층 상에 형성되는, 픽셀 회로. - 제7항에 있어서,
상기 전기 접속부는 실리콘 관통 전극을 포함하는, 픽셀 회로. - 복수의 서브 픽셀을 포함하는 마이크로디스플레이로서,
각각의 상기 서브 픽셀이, 제7항에 따른 상기 픽셀 구동 회로를 포함하는, 마이크로디스플레이. - 제12항에 있어서,
상기 하부 영역을 포함하는 상기 실리콘 층 및 상기 상부 영역을 포함하는 상기 실리콘 층이 서로 접합되어 있는, 픽셀 회로. - 제12항에 있어서,
상기 픽셀 회로의 길이 및 폭이 4 ㎛ x 4 ㎛ 미만인, 픽셀 회로. - 수직 적층형 픽셀 회로를 형성하는 방법으로서,
제1 실리콘 기판을 제공하는 단계;
상기 제1 실리콘 기판 상에 적어도 저전압 회로 및 적어도 하나의 비아(via)를 형성하는 단계;
제2 실리콘 기판을 제공하는 단계;
상기 제2 실리콘 기판 상에 고전압 회로 및 적어도 하나의 비아를 형성하는 단계;
상기 제1 실리콘 기판의 상단에 상기 제2 실리콘 기판을 부착하되, 상기 제2 실리콘 기판 상의 상기 적어도 하나의 비아는, 실리콘 관통 전극(through-silicon via)을 형성하도록 상기 제1 실리콘 기판 상의 상기 적어도 하나의 비아와 정렬되고, 상기 저전압 회로 및 상기 고전압 회로는 상기 실리콘 관통 전극을 통해 전기적으로 연결되는 단계; 및
상기 제2 실리콘 기판 상에 적어도 하나의 유기 발광 다이오드를 제조하는 단계;
를 포함하는, 방법. - 제17항에 있어서,
상기 저전압 회로는 매트릭스 어드레싱 회로, 데이터 저장 회로 및 균일도 보상 회로를 포함하는, 방법. - 제17항에 있어서,
상기 매트릭스 어드레싱 회로는 선택 스위치를 포함하고, 상기 데이터 저장 회로는 저장 커패시터를 포함하는, 방법. - 제19항에 있어서,
상기 저장 커패시터는 트렌치 커패시터(trench capacitor)를 포함하는, 픽셀 회로. - 제17항에 있어서,
상기 고전압 회로는 픽셀 구동 회로를 포함하는, 방법. - 제21항에 있어서,
상기 픽셀 구동 회로는 적어도 하나의 고전압 트랜지스터를 포함하는, 방법. - 제17항에 있어서,
상기 제2 실리콘 기판을 상기 제1 실리콘 기판에 부착하기 전, 상기 제2 실리콘 기판을 박형화(thinning)하는 단계;
를 더 포함하는, 방법. - 제23항에 있어서,
상기 제2 실리콘 기판의 두께가 20 ㎛ 미만이 되도록 상기 제2 실리콘 기판이 박형화되는, 방법. - 제17항에 있어서,
복수의 상기 수직 적층형 픽셀 회로를 이용하여 마이크로디스플레이를 제조하는 단계;
를 더 포함하는, 방법. - 제17항에 있어서,
상기 픽셀 회로의 길이 및 폭이 4 ㎛ x 4 ㎛ 미만인, 방법.
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US16/279,809 US10950178B2 (en) | 2018-02-20 | 2019-02-19 | Microdisplay with reduced pixel size and method of forming same |
US16/279,809 | 2019-02-19 | ||
PCT/US2019/018671 WO2019164867A1 (en) | 2018-02-20 | 2019-02-20 | 3d pixel circuit for microdisplay with reduced pixel size and method of forming same |
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TW201941420A (zh) | 2019-10-16 |
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JP7371025B2 (ja) | 2023-10-30 |
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