KR102034714B1 - 발광 소자 - Google Patents
발광 소자 Download PDFInfo
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- KR102034714B1 KR102034714B1 KR1020130104707A KR20130104707A KR102034714B1 KR 102034714 B1 KR102034714 B1 KR 102034714B1 KR 1020130104707 A KR1020130104707 A KR 1020130104707A KR 20130104707 A KR20130104707 A KR 20130104707A KR 102034714 B1 KR102034714 B1 KR 102034714B1
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Images
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/819—Bodies characterised by their shape, e.g. curved or truncated substrates
- H10H20/82—Roughened surfaces, e.g. at the interface between epitaxial layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/822—Materials of the light-emitting regions
- H10H20/824—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP
- H10H20/825—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP containing nitrogen, e.g. GaN
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/83—Electrodes
- H10H20/831—Electrodes characterised by their shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30604—Chemical etching
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Abstract
Description
도 2 내지 도 8은 실시 예에 따른 발광 소자의 제조 방법을 나타낸다.
도 9는 도 5의 건식 식각에 의하여 형성되는 홈의 확대도를 나타낸다.
도 10은 도 6의 습식 식각에 의하여 형성되는 요철부의 제1 실시 예를 나타낸다.
도 11은 도 6의 습식 식각에 의하여 형성되는 요철부의 제2 실시 예를 나타낸다.
도 12는 도 6의 습식 식각에 의하여 형성되는 요철부의 제3 실시 예를 나타낸다.
도 13은 도 6의 습식 식각에 의하여 형성되는 요철부의 제4 실시 예를 나타낸다.
도 15 내지 도 16은 요철의 형태 및 크기에 따른 광 추출 효율의 시뮬레이션 결과를 나타낸다.
도 17은 실시 예에 따른 발광 소자 패키지를 나타낸다.
도 18은 실시 예에 따른 발광 소자를 포함하는 조명 장치를 나타낸다.
도 19는 실시 예에 따른 발광 소자를 포함하는 표시 장치를 나타낸다.
20: 확산 방지층 30: 반사층
40: 오믹층 50: 보호층
60: 전류 차단층 70: 발광 구조물
72: 제2 도전형 반도체층 74: 활성층
76: 제1 도전형 반도체층 80: 패시베이션층
90: 제1 전극 110: 버퍼층
115: 제1 식각 정지층 115-1: 제3 질화물 반도체층
120: 중간층 120-1: 제2 질화물 반도체층
130: 제2 식각 정지층, 제1 질화물 반도체층
201: 볼록부 202: 오목부
203: 제1 요철 206: 제2 요철
208: 제3 요철.
Claims (11)
- 제1 도전형 반도체층, 활성층, 및 제2 도전형 반도체층을 포함하는 발광 구조물; 및
상기 발광 구조물 상에 배치되는 광 추출부를 포함하고,
상기 광 추출부는,
상기 제1 도전형 반도체층 상에 배치되고, 제1 습식 식각률을 갖는 제1 질화물 반도체층;
볼록부와 오목부를 포함하고, 상기 볼록부는 상기 제1 질화물 반도체층 상에 배치되는 제2 질화물 반도체층과 상기 제2 질화물 반도체층 상에 배치되는 제3 질화물 반도체층을 포함하는 제1 요철;
상기 제1 요철의 상기 제3 질화물 반도체층의 표면에 형성되는 제2 요철을 포함하고,
상기 제2 질화물 반도체층은 제2 습식 식각률을 갖고, 상기 제3 질화물 반도체층은 제3 습식 식각률을 갖고,
상기 제1 습식 식각률과 상기 제3 습식 식각률은 상기 제2 습식 식각률보다 낮은 발광 소자. - 삭제
- 제1항에 있어서,
상기 제1 질화물 반도체층 및 상기 제3 질화물 반도체층 각각은 알루미늄을 포함하는 조성을 갖고, 상기 제2 질화물 반도체층은 알루미늄을 제외한 조성을 갖는 발광 소자. - 제1항에 있어서,
상기 제1 내지 제3 질화물 반도체층들 각각은 알루미늄을 포함하는 조성을 가지며, 상기 제1 질화물 반도체층과 상기 제3 질화물 반도체층 각각의 알루미늄의 함량은 상기 제2 질화물 반도체층의 알루미늄의 함량보다 많은 발광 소자. - 제1항에 있어서,
상기 제1 질화물 반도체층의 조성은 AlxGa(1-x)N(0<x≤1)이고, 상기 제3 질화물 반도체층의 조성은 AlyGa(1-y)N(0<y≤1)이고, 상기 제2 질화물 반도체층의 조성은 AlzGa(1-z)N(0≤z≤1)이고, x 및 y는 z보다 큰 발광 소자. - 제1항에 있어서,
상기 제1 요철은 규칙적인 패턴 형상이고, 상기 제2 요철은 불규칙적인 패턴 형상인 발광 소자. - 제1항에 있어서,
상기 제1 요철의 오목부는 상기 제1 질화물 반도체층의 상면을 노출하는 발광 소자. - 제7항에 있어서,
상기 제1 요철의 오목부에 의하여 노출되는 상기 제1 질화물 반도체층의 상면에 형성되는 제3 요철을 더 포함하는 발광 소자. - 제1항에 있어서,
상기 제1 질화물 반도체층 및 상기 제3 질화물 반도체층 각각의 두께는 5nm ~ 50nm인 발광 소자. - 제1항에 있어서,
상기 제1 습식 식각률과 상기 제2 습식 식각률의 비율, 및 상기 제3 습식 식각률과 상기 제2 습식 식각률의 비율은 1:5~100인 발광 소자. - 제1항에 있어서,
상기 광 추출부 상에 배치되는 제1 전극; 및
상기 제2 도전형 반도체층 아래에 배치되는 제2 전극을 더 포함하는 발광 소자.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020130104707A KR102034714B1 (ko) | 2013-09-02 | 2013-09-02 | 발광 소자 |
PCT/KR2014/007475 WO2015030391A1 (ko) | 2013-09-02 | 2014-08-12 | 발광 소자 |
US14/915,757 US20160197235A1 (en) | 2013-09-02 | 2014-08-12 | Light-emitting element |
CN201480048407.XA CN105518879B (zh) | 2013-09-02 | 2014-08-12 | 发光元件 |
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KR1020130104707A KR102034714B1 (ko) | 2013-09-02 | 2013-09-02 | 발광 소자 |
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KR20150026199A KR20150026199A (ko) | 2015-03-11 |
KR102034714B1 true KR102034714B1 (ko) | 2019-10-21 |
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KR102087947B1 (ko) * | 2014-07-18 | 2020-03-11 | 엘지이노텍 주식회사 | 발광 소자 및 그 제조 방법 |
Citations (1)
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US20130161584A1 (en) | 2011-12-27 | 2013-06-27 | Mark Albert Crowder | Light Emitting Diode (LED) Using Three-Dimensional Gallium Nitride (GaN) Pillar Structures with Planar Surfaces |
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