JP4963807B2 - 窒化ガリウム系化合物半導体発光素子 - Google Patents
窒化ガリウム系化合物半導体発光素子 Download PDFInfo
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- JP4963807B2 JP4963807B2 JP2005227164A JP2005227164A JP4963807B2 JP 4963807 B2 JP4963807 B2 JP 4963807B2 JP 2005227164 A JP2005227164 A JP 2005227164A JP 2005227164 A JP2005227164 A JP 2005227164A JP 4963807 B2 JP4963807 B2 JP 4963807B2
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- 239000004065 semiconductor Substances 0.000 title claims description 108
- 229910002601 GaN Inorganic materials 0.000 title claims description 55
- -1 Gallium nitride compound Chemical class 0.000 title claims description 20
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 27
- 150000001875 compounds Chemical class 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
- 229910052709 silver Inorganic materials 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- 229910052737 gold Inorganic materials 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 229910052763 palladium Inorganic materials 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 229910052703 rhodium Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 229910052741 iridium Inorganic materials 0.000 claims description 4
- 229910052762 osmium Inorganic materials 0.000 claims description 4
- 229910052707 ruthenium Inorganic materials 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052702 rhenium Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910052713 technetium Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 20
- 239000000463 material Substances 0.000 description 12
- 238000004544 sputter deposition Methods 0.000 description 11
- 239000010408 film Substances 0.000 description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000005253 cladding Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910052594 sapphire Inorganic materials 0.000 description 6
- 239000010980 sapphire Substances 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 238000001459 lithography Methods 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 238000005530 etching Methods 0.000 description 4
- 229910002704 AlGaN Inorganic materials 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910052774 Proactinium Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
- H01L33/38—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes with a particular shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
- H01L33/40—Materials therefor
- H01L33/405—Reflective materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/06—Structure, shape, material or disposition of the bonding areas prior to the connecting process of a plurality of bonding areas
- H01L2224/0601—Structure
- H01L2224/0603—Bonding areas having different sizes, e.g. different heights or widths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0016—Processes relating to electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/20—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/30—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table
- H01L33/32—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table containing nitrogen
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
- H01L33/40—Materials therefor
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- Engineering & Computer Science (AREA)
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- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Led Devices (AREA)
Description
図2は本実施例で製造した窒化ガリウム系化合物半導体発光素子の断面を示した模式図である。図3はその平面図である。
(1)まず、上記の窒化ガリウム系化合物半導体積層物の負極形成領域のnコンタクト層3aを露出させた。手順は以下のとおりである。公知のリソグラフィー技術およびリフトオフ技術を用いて、エッチングマスクをpコンタクト層5a上の負極形成領域以外の領域に形成した。
得られた発光素子を目視観察した結果、オーバーコート層の角部を含む箇所でオーバーコート層の剥がれは全く観察されなかった。また、得られた発光素子の駆動電圧と出力を評価したところ、電流20mAで駆動電圧は3.3Vであり、出力は8.5mWであった。
電極の平面形状を図4に示した形状としたことを除いて、実施例1と同様の方法で窒化ガリウム系化合物半導体発光素子を作製した。第一の電極の側面とオーバーコート層の側面との間隔は実施例1と同様10μmになるようにした。また、正極の角部A〜EおよびHでは第一の電極を円弧状とし、FおよびGではオーバーコート層を円弧状とした。そのRは実施例1と同様30μmとした。
第一の電極の角部を円弧状とせずに、各辺をそのまま延長して交わらせた直角の角型としたことを除いて、実施例1と同様の方法で窒化ガリウム系化合物半導体発光素子を作製した。得られた発光素子を目視観察した結果、オーバーコート層の角部を含む箇所でオーバーコート層の剥がれが観察された。不良率は10〜80%であった。
2 バッファ層
3 n型半導体層
4 発光層
5 p型半導体層
10 正極
11 第一の電極
12 オーバーコート層
13 ボンディングパッド層
20 負極
Claims (6)
- 基板上に窒化ガリウム系化合物半導体からなる、n型半導体層、発光層およびp型半導体層がこの順序で積層され、正極および負極がそれぞれp型半導体層およびn型半導体層に接して設けられた発光素子において、該正極が少なくとも第一の電極と、該第一の電極の側面と上面を覆うオーバーコート層を含み、該オーバーコート層がp型半導体層と接する面積が、第一の電極の外縁の単位長さあたりで、正極の角部において辺部よりも大きく、該第一の電極または該オーバーコート層の平面投影形状における角部の角度を鈍角にすることにより、オーバーコート層がp型半導体層と接する面積を正極の角部において辺部よりも大きくしているか、または、該第一の電極または該オーバーコート層の平面投影形状における角部を円弧状にすることにより、オーバーコート層がp型半導体層と接する面積を正極の角部において辺部よりも大きくしていることを特徴とする窒化ガリウム系化合物半導体発光素子。
- 第一の電極の側面とオーバーコート層の側面との間隔が0.1〜50μmである請求項1に記載の窒化ガリウム系化合物半導体発光素子。
- 第一の電極が反射性の電極である請求項1または2に記載の窒化ガリウム系化合物半導体発光素子。
- 第一の電極がAgまたはAlを含んでいる反射性の電極である請求項3に記載の窒化ガリウム系化合物半導体発光素子。
- オーバーコート層がTi、V、Cr、Mn、Fe、Co、Ni、Zr、Nb、Mo、Tc、Ru、Rh、Pd、Hf、Ta、W、Re、Os、Ir、PtおよびAuの群から選ばれる少なくとも一種の金属またはこれらの少なくとも一種を含む合金である請求項3または4に記載の窒化ガリウム系化合物半導体発光素子。
- 請求項1〜5のいずれか一項に記載の窒化ガリウム系化合物半導体発光素子を用いてなるランプ。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005227164A JP4963807B2 (ja) | 2005-08-04 | 2005-08-04 | 窒化ガリウム系化合物半導体発光素子 |
EP06782222.1A EP1911105B1 (en) | 2005-08-04 | 2006-07-27 | Gallium nitride-based compound semiconductor light-emitting device |
CN2006800287749A CN101238594B (zh) | 2005-08-04 | 2006-07-27 | 氮化镓基化合物半导体发光器件 |
KR1020087002925A KR100955007B1 (ko) | 2005-08-04 | 2006-07-27 | 질화 갈륨계 화합물 반도체 발광 소자 |
US11/997,624 US8093605B2 (en) | 2005-08-04 | 2006-07-27 | Gallium nitride-based compound semiconductor light-emitting device with an electrode covered by an over-coating layer |
PCT/JP2006/315362 WO2007015537A1 (en) | 2005-08-04 | 2006-07-27 | Gallium nitride-based compound semiconductor light-emitting device |
TW095128543A TWI313939B (en) | 2005-08-04 | 2006-08-03 | Gallium nitride-based compound semiconductor light-emitting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2005227164A JP4963807B2 (ja) | 2005-08-04 | 2005-08-04 | 窒化ガリウム系化合物半導体発光素子 |
Publications (2)
Publication Number | Publication Date |
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JP2007042952A JP2007042952A (ja) | 2007-02-15 |
JP4963807B2 true JP4963807B2 (ja) | 2012-06-27 |
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JP2005227164A Active JP4963807B2 (ja) | 2005-08-04 | 2005-08-04 | 窒化ガリウム系化合物半導体発光素子 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8093605B2 (ja) |
EP (1) | EP1911105B1 (ja) |
JP (1) | JP4963807B2 (ja) |
KR (1) | KR100955007B1 (ja) |
CN (1) | CN101238594B (ja) |
TW (1) | TWI313939B (ja) |
WO (1) | WO2007015537A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8080833B2 (en) * | 2007-01-26 | 2011-12-20 | Crystal Is, Inc. | Thick pseudomorphic nitride epitaxial layers |
CN101990714B (zh) * | 2008-04-30 | 2012-11-28 | Lg伊诺特有限公司 | 发光器件和用于制造发光器件的方法 |
JP5334601B2 (ja) * | 2009-01-21 | 2013-11-06 | 株式会社東芝 | 半導体発光ダイオード素子及び半導体発光装置 |
JP5332882B2 (ja) * | 2009-04-30 | 2013-11-06 | 豊田合成株式会社 | 半導体発光素子 |
JP4940363B1 (ja) * | 2011-02-28 | 2012-05-30 | 株式会社東芝 | 半導体発光素子及び半導体発光装置 |
CN103066177A (zh) * | 2011-10-19 | 2013-04-24 | 展晶科技(深圳)有限公司 | 发光二极管晶粒 |
TWI458130B (zh) * | 2012-02-06 | 2014-10-21 | Lextar Electronics Corp | 無線固態發光裝置 |
USD752527S1 (en) * | 2014-04-30 | 2016-03-29 | Epistar Corporation | Light-emitting diode device |
USD733079S1 (en) * | 2014-04-30 | 2015-06-30 | Epistar Corporation | Light-emitting diode device |
TWD177216S (zh) * | 2015-02-05 | 2016-07-21 | 榮創能源科技股份有限公司 | 發光二極體封裝 |
WO2018116350A1 (ja) * | 2016-12-19 | 2018-06-28 | サンケン電気株式会社 | 発光装置 |
Family Cites Families (17)
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JPH0488684A (ja) | 1990-08-01 | 1992-03-23 | Koito Mfg Co Ltd | Ledチップの電極構造 |
JPH0856017A (ja) * | 1994-08-09 | 1996-02-27 | Omron Corp | 半導体素子及びその製造方法、並びに半導体素子製作用マスク |
US6268618B1 (en) * | 1997-05-08 | 2001-07-31 | Showa Denko K.K. | Electrode for light-emitting semiconductor devices and method of producing the electrode |
JP4118371B2 (ja) | 1997-12-15 | 2008-07-16 | フィリップス ルミレッズ ライティング カンパニー リミテッド ライアビリティ カンパニー | 電極に銀を有する窒化物半導体発光装置およびその製造方法ならびに半導体光電子装置 |
JPH11220171A (ja) * | 1998-02-02 | 1999-08-10 | Toyoda Gosei Co Ltd | 窒化ガリウム系化合物半導体素子 |
JP2004363621A (ja) | 1998-05-13 | 2004-12-24 | Toyoda Gosei Co Ltd | Iii族窒化物系化合物半導体発光素子 |
EP1091393B1 (en) * | 1999-02-18 | 2008-04-09 | The Furukawa Electric Co., Ltd. | Electrode for semiconductor device and its manufacturing method |
US6838705B1 (en) * | 1999-03-29 | 2005-01-04 | Nichia Corporation | Nitride semiconductor device |
WO2001073858A1 (en) * | 2000-03-31 | 2001-10-04 | Toyoda Gosei Co., Ltd. | Group-iii nitride compound semiconductor device |
JP4024994B2 (ja) * | 2000-06-30 | 2007-12-19 | 株式会社東芝 | 半導体発光素子 |
KR100419613B1 (ko) * | 2000-09-04 | 2004-02-25 | 삼성전기주식회사 | 전류밀도 분산용 전극구조를 구비한 청색 발광소자 |
US6603152B2 (en) * | 2000-09-04 | 2003-08-05 | Samsung Electro-Mechanics Co., Ltd. | Blue light emitting diode with electrode structure for distributing a current density |
JP2002155507A (ja) | 2000-11-17 | 2002-05-31 | Koichi Matsumoto | 橋 梁 |
US6657237B2 (en) * | 2000-12-18 | 2003-12-02 | Samsung Electro-Mechanics Co., Ltd. | GaN based group III-V nitride semiconductor light-emitting diode and method for fabricating the same |
US6445007B1 (en) * | 2001-03-19 | 2002-09-03 | Uni Light Technology Inc. | Light emitting diodes with spreading and improving light emitting area |
JP2003168823A (ja) * | 2001-09-18 | 2003-06-13 | Toyoda Gosei Co Ltd | Iii族窒化物系化合物半導体発光素子 |
US20080283850A1 (en) | 2004-06-24 | 2008-11-20 | Koji Kamei | Reflective Positive Electrode and Gallium Nitride-Based Compound Semiconductor Light-Emitting Device Using the Same |
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2005
- 2005-08-04 JP JP2005227164A patent/JP4963807B2/ja active Active
-
2006
- 2006-07-27 EP EP06782222.1A patent/EP1911105B1/en active Active
- 2006-07-27 KR KR1020087002925A patent/KR100955007B1/ko active IP Right Grant
- 2006-07-27 US US11/997,624 patent/US8093605B2/en active Active
- 2006-07-27 CN CN2006800287749A patent/CN101238594B/zh active Active
- 2006-07-27 WO PCT/JP2006/315362 patent/WO2007015537A1/en active Application Filing
- 2006-08-03 TW TW095128543A patent/TWI313939B/zh active
Also Published As
Publication number | Publication date |
---|---|
WO2007015537A1 (en) | 2007-02-08 |
US20100102326A1 (en) | 2010-04-29 |
JP2007042952A (ja) | 2007-02-15 |
CN101238594A (zh) | 2008-08-06 |
KR100955007B1 (ko) | 2010-04-27 |
EP1911105A4 (en) | 2011-05-25 |
EP1911105A1 (en) | 2008-04-16 |
TW200717869A (en) | 2007-05-01 |
KR20080030083A (ko) | 2008-04-03 |
TWI313939B (en) | 2009-08-21 |
EP1911105B1 (en) | 2014-01-08 |
US8093605B2 (en) | 2012-01-10 |
CN101238594B (zh) | 2012-07-04 |
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