KR102684977B1 - 반도체 발광소자 제조방법 - Google Patents
반도체 발광소자 제조방법 Download PDFInfo
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Abstract
Description
도 2 내지 도 15는 본 발명의 일 실시예에 의한 반도체 발광소자 제조방법을 설명하기 위한 단면도들이다.
도 16 및 도 17은 본 발명의 일 실시예에 의한 반도체 발광소자 제조방법을 설명하기 위한 단면도들이다.
도 18은 도 13의 제1 평탄화층을 촬영한 SEM사진이다.
200, 400: 제1 평탄화층
300: 제2 평탄화층
GS: 성장용 기판
ISO: 소자분리영역
LED1, LED2: 발광셀
SS: 지지 기판
LC1~LCn: 발광구조물
Claims (10)
- 제1 기판 상에 개별화된 복수의 발광셀을 형성하는 단계;
상기 복수의 발광셀을 덮도록 상기 복수의 발광셀의 두께 보다 두꺼운 두께로 절연물질을 적층하여 제1 평탄화층을 형성하는 단계;
상기 제1 평탄화층을 덮어 평탄한 상면을 갖도록 포토레지스트를 도포하고, 상기 포토레지스트를 소프트 베이킹(soft baking)하여 제2 평탄화층을 형성하는 단계; 및
상기 제1 평탄화층 중 상기 복수의 발광셀 상에 위치한 부분이 노출되도록 상기 제2 평탄화층을 소정의 깊이로 건식 식각하는 단계 - 상기 제2 평탄화층 중 상기 복수의 발광셀 사이에 위치한 부분은 상기 제1 평탄화층 상에 잔류함 -;를 포함하며,
상기 제2 평탄화층을 형성하는 단계 및 상기 건식 식각하는 단계는, 상기 제2 평탄화층 중 상기 복수의 발광셀 사이에 위치한 부분이 제거될 때까지 상기 제2 평탄화층을 형성하고 상기 건식 식각하는 순서대로 적어도 1회 반복하여 수행되는 반도체 발광소자 제조방법.
- 제1항에 있어서,
상기 복수의 발광셀을 형성하는 단계는,
제1 기판 상에 제1 도전형 반도체층, 활성층 및 제2 도전형 반도체층을 순차적으로 형성하는 단계; 및
제1 도전형 반도체층, 활성층 및 제2 도전형 반도체층을 부분 식각하여 상기 제1 기판의 일부를 노출하는 단계;를 포함하는 반도체 발광소자 제조방법.
- 제1항에 있어서,
상기 제1 기판은 성장용 기판인 반도체 발광소자 제조방법.
- 제1항에 있어서,
상기 제1 평탄화층과 상기 제2 평탄화층은 상기 건식 식각에 대한 식각 선택비는 1:0.1 내지 1:2.0인 반도체 발광소자 제조방법.
- 제1항에 있어서,
상기 절연물질은 실리콘 산화물 또는 실리콘 질화물을 포함하는 물질인 반도체 발광소자 제조방법.
- 제2항에 있어서,
상기 복수의 발광셀은 각각 상기 제1 도전형 반도체층을 공유하며, 상기 활성층 및 상기 제2 도전형 반도체층이 분리된 복수의 발광구조물을 포함하는 반도체 발광소자 제조방법.
- 제6항에 있어서,
상기 복수의 발광구조물 사이를 접속하는 연결전극을 형성하는 단계를 더 포함하는 반도체 발광소자 제조방법.
- 제1항에 있어서,
상기 건식 식각하는 단계 후에,
상기 제1 평탄화층 상에 제2 기판을 접합하는 단계를 더 포함하는 반도체 발광소자 제조방법.
- 제8항에 있어서,
상기 제1 기판 및 상기 제2 기판은 동일한 조성의 물질로 이루어진 반도체 발광소자 제조방법.
- 제1항에 있어서,
상기 제1 평탄화층을 형성하는 단계는,
상기 복수의 발광셀 사이의 이격공간을 매립하는 반도체 발광소자 제조방법.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190081791A KR102684977B1 (ko) | 2019-07-08 | 2019-07-08 | 반도체 발광소자 제조방법 |
| US16/727,496 US11264532B2 (en) | 2019-07-08 | 2019-12-26 | Manufacturing method of semiconductor light emitting device |
| DE102020109641.0A DE102020109641A1 (de) | 2019-07-08 | 2020-04-07 | Herstellungsverfahren für lichtemittierendes Halbleiterbauelement |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020190081791A KR102684977B1 (ko) | 2019-07-08 | 2019-07-08 | 반도체 발광소자 제조방법 |
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| Publication Number | Publication Date |
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| KR20210006538A KR20210006538A (ko) | 2021-01-19 |
| KR102684977B1 true KR102684977B1 (ko) | 2024-07-17 |
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| KR1020190081791A Active KR102684977B1 (ko) | 2019-07-08 | 2019-07-08 | 반도체 발광소자 제조방법 |
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| Country | Link |
|---|---|
| US (1) | US11264532B2 (ko) |
| KR (1) | KR102684977B1 (ko) |
| DE (1) | DE102020109641A1 (ko) |
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| US12272721B2 (en) * | 2021-02-25 | 2025-04-08 | Asahi Kasei Microdevices Corporation | Optical element and optical concentration measuring apparatus |
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| DE102020109641A1 (de) | 2021-01-14 |
| US11264532B2 (en) | 2022-03-01 |
| US20210013369A1 (en) | 2021-01-14 |
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