JP5259292B2 - 発光ダイオード - Google Patents
発光ダイオード Download PDFInfo
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- JP5259292B2 JP5259292B2 JP2008196779A JP2008196779A JP5259292B2 JP 5259292 B2 JP5259292 B2 JP 5259292B2 JP 2008196779 A JP2008196779 A JP 2008196779A JP 2008196779 A JP2008196779 A JP 2008196779A JP 5259292 B2 JP5259292 B2 JP 5259292B2
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- layer
- emitting diode
- refractive index
- light emitting
- dbr
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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
- H10H20/862—Resonant cavity structures
-
- 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
- H10H20/814—Bodies having reflecting means, e.g. semiconductor Bragg reflectors
- H10H20/8142—Bodies having reflecting means, e.g. semiconductor Bragg reflectors forming resonant cavity structures
-
- 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
- H10H20/832—Electrodes characterised by their material
- H10H20/833—Transparent materials
-
- 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
- H10H20/84—Coatings, e.g. passivation layers or antireflective coatings
- H10H20/841—Reflective coatings, e.g. dielectric Bragg reflectors
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Description
好ましくは、前記トンネル層は、n型不純物が高濃度でドープされたn型トンネル層(n++)である。
好ましくは、前記発光ダイオードは、前記活性層の下端面に形成される下部DBRをさらに備える。
図1を参照すると、本実施例の発光ダイオード1は、基板100、前記基板100上に形成されるn型半導体層220、活性層240、及びp型半導体層260を備える。前記活性層240は、前記n型半導体層220と前記p型半導体層260との間に介在され、前記p型半導体層260の上面には、透明電極層320が形成される。また、前記活性層240と前記p型半導体層260の一部が除去され、前記n型半導体層220の一部が上側に露出され得る。前記透明電極層320の上面には、p型電極パッド340が形成され、前記n型半導体層220の上面には、n型電極パッド440が形成され得る。
100 基板
210 バッファ層
220 n型半導体層
240 活性層
260 p型半導体層
310 トンネル層
320 透明電極層
330 DBR
340 p型電極パッド
342 開口部
440 n型電極パッド
Claims (14)
- n型半導体層、活性層、p型半導体層、及び透明電極層が基板上に形成された発光ダイオードであって、
前記p型半導体層と前記透明電極層との間に介在されるトンネル層と、
前記トンネル層を上側に露出させるように、前記透明電極層に形成された開口部と、
前記開口部内の前記トンネル層上に形成されるDBR(Distributed Bragg Reflector)と、
前記開口部内のDBRを覆うように、前記透明電極層上に形成される電極パッドと、
を備えることを特徴とする発光ダイオード。 - 前記電極パッドの側面部は、前記透明電極層の前記開口部の内側面と当接し、前記電極パッドの底部は、前記DBRと当接することを特徴とする請求項1に記載の発光ダイオード。
- 前記トンネル層は、n型不純物が高濃度でドープされたn型トンネル層(n++)であることを特徴とする請求項1に記載の発光ダイオード。
- 前記透明電極層は、ITO層であることを特徴とする請求項1に記載の発光ダイオード。
- 前記活性層の下端面に形成される下部DBRをさらに備えることを特徴とする請求項1に記載の発光ダイオード。
- 前記発光ダイオードは、窒化ガリウム系であることを特徴とする請求項1に記載の発光ダイオード。
- 前記DBRは、低屈折率層と高屈折率層とが繰り返して積層されていることを特徴とする請求項1に記載の発光ダイオード。
- 前記低屈折率層は、SiO2またはAl2O3を含むことを特徴とする請求項7に記載の発光ダイオード。
- 前記高屈折率層は、Si3N4、TiO2またはSi−Hを含むことを特徴とする請求項7に記載の発光ダイオード。
- 前記DBRは、前記電極パッドよりも高い屈折率の高屈折率層を有することを特徴とする請求項1に記載の発光ダイオード。
- 前記低屈折率層のいずれか一層が前記p型半導体層と当接することを特徴とする請求項7に記載の発光ダイオード。
- 前記DBRは、低屈折率層と高屈折率層とが複数交互に積層しており、前記低屈折率層は、SiO2またはAl2O3を含み、前記高屈折率層は、Si3N4またはTiO2を含み、
mを奇数とし、λを波長とし、nlを前記低屈折率層の屈折率とし、nhを前記高屈折率層の屈折率とし、第1の厚さをmλ/4nlにより表し、第2の厚さをmλ/4nhにより表したとき、前記低屈折率層は前記第1の厚さを有し、前記高屈折率層は前記第2の厚さを有し、前記DBRは波長λの光について少なくとも95%の反射率を有することを特徴とする請求項1に記載の発光ダイオード。 - 前記波長λは、前記活性層が発生する光の波長に対応していることを特徴とする請求項12に記載の発光ダイオード。
- n型半導体層、活性層、p型半導体層、及び透明電極層が基板上に形成された発光ダイオードであって、
前記透明電極層に形成された開口部と、
前記開口部内に一部が満たされるように形成される電極パッドと、
前記p型半導体層上に形成されたまま、前記開口部内において前記電極パッドと接触するn++またはアンドープ層と、
を備えることを特徴とする発光ダイオード。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2007-0108686 | 2007-10-29 | ||
| KR1020070108686A KR101393353B1 (ko) | 2007-10-29 | 2007-10-29 | 발광다이오드 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2009111342A JP2009111342A (ja) | 2009-05-21 |
| JP2009111342A5 JP2009111342A5 (ja) | 2011-09-15 |
| JP5259292B2 true JP5259292B2 (ja) | 2013-08-07 |
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ID=40581658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008196779A Active JP5259292B2 (ja) | 2007-10-29 | 2008-07-30 | 発光ダイオード |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US7863599B2 (ja) |
| JP (1) | JP5259292B2 (ja) |
| KR (1) | KR101393353B1 (ja) |
Cited By (1)
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| KR100721515B1 (ko) | 2006-01-09 | 2007-05-23 | 서울옵토디바이스주식회사 | Ⅰto층을 갖는 발광다이오드 및 그 제조방법 |
| JP2007287757A (ja) * | 2006-04-12 | 2007-11-01 | Rohm Co Ltd | 窒化物半導体発光素子及び窒化物半導体発光素子の製造方法 |
| JP2008211164A (ja) * | 2007-01-29 | 2008-09-11 | Matsushita Electric Ind Co Ltd | 窒化物半導体発光装置及びその製造方法 |
| KR101393353B1 (ko) * | 2007-10-29 | 2014-05-13 | 서울바이오시스 주식회사 | 발광다이오드 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170003105A (ko) * | 2015-06-30 | 2017-01-09 | 엘지이노텍 주식회사 | 발광소자 |
| KR102353850B1 (ko) | 2015-06-30 | 2022-01-20 | 쑤저우 레킨 세미컨덕터 컴퍼니 리미티드 | 발광소자 |
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| Publication number | Publication date |
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| JP2009111342A (ja) | 2009-05-21 |
| US7982207B2 (en) | 2011-07-19 |
| US20110049472A1 (en) | 2011-03-03 |
| KR101393353B1 (ko) | 2014-05-13 |
| KR20090043057A (ko) | 2009-05-06 |
| US7863599B2 (en) | 2011-01-04 |
| US20090108250A1 (en) | 2009-04-30 |
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