JP2011114123A - 光半導体装置 - Google Patents
光半導体装置 Download PDFInfo
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- JP2011114123A JP2011114123A JP2009268527A JP2009268527A JP2011114123A JP 2011114123 A JP2011114123 A JP 2011114123A JP 2009268527 A JP2009268527 A JP 2009268527A JP 2009268527 A JP2009268527 A JP 2009268527A JP 2011114123 A JP2011114123 A JP 2011114123A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 110
- 230000003287 optical effect Effects 0.000 title claims abstract description 47
- 150000004767 nitrides Chemical class 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 36
- 229910052814 silicon oxide Inorganic materials 0.000 abstract description 36
- 239000012535 impurity Substances 0.000 abstract description 11
- 239000010410 layer Substances 0.000 description 289
- 238000000605 extraction Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 229920002120 photoresistant polymer Polymers 0.000 description 11
- 239000000758 substrate Substances 0.000 description 11
- 229910052594 sapphire Inorganic materials 0.000 description 10
- 239000010980 sapphire Substances 0.000 description 10
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 8
- 238000010894 electron beam technology Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000000206 photolithography Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000006798 recombination Effects 0.000 description 3
- 238000005215 recombination Methods 0.000 description 3
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 2
- IBEFSUTVZWZJEL-UHFFFAOYSA-N trimethylindium Chemical compound C[In](C)C IBEFSUTVZWZJEL-UHFFFAOYSA-N 0.000 description 2
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000004544 sputter 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
- H01L33/02—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
- H01L33/14—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 carrier transport control structure, e.g. highly-doped semiconductor layer or current-blocking structure
-
- 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
- H01L33/387—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 with a plurality of electrode regions in direct contact with the semiconductor body and being electrically interconnected by another electrode layer
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- 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
- H01L33/025—Physical imperfections, e.g. particular concentration or distribution of impurities
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- 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
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- 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
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- H01L33/40—Materials therefor
- H01L33/42—Transparent materials
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Abstract
【解決手段】n型GaN層2、活性層3、p型GaN層4上に酸化シリコン層5及び台形凸部p型GaN層6’を設け、酸化シリコン層5及び台形凸部p型GaN層6’上に透明電極層7及び反射電極層8を設ける。台形凸部p型GaN層6’における不純物濃度もしくはキャリア密度は台形の底部から先端部へ向かって段階的もしくは連続的に増大している。この結果、電流は台形凸部p型GaN層6’の台形の側面、先端部からも活性層3へ注入され、活性層3の広い領域で発光する。
【選択図】 図1
Description
L1 ∝ g
である。
L2’ ∝ g + h
である。たとえば、g=0.1μm、h=1.2μmとすれば、
L2’/L1 = (g + h)/g
= (0.1+1.2)/0.1
= 13
となり、比較例の場合の13倍となる。さらに、実際の電流注入は台形凸部p型GaN層6’の表面全部もしくは先端部周辺の領域から行われるために、比較例に対する発光領域増加率L2/L1はさらに大きくなると期待できる。この結果、光出力が増大する。尚、台形凸部p型GaN層6’は台形に限定されず、三角形凸部p型GaN層であってもよい。
S1 = (3/2) √3 (a + 2h/3)2
= (1/2) √3 (d + 2h/√3)2 (1)
但し、aは六角形凹部の一辺の長さ、
dは酸化シリコン層5の直径、
hは台形凸部p型GaN層6’の高さ、
である。
S2 = 4h・√3 (a + h/3)
= 4h (d + h/√3) (2)
となる。
S2 ≧ S1
従って、
h ≧ (3a/2)(√2-1)
あるいは
h ≧ (√3d/2)(√2-1) (3)
(3a/2)(√2-1) ≦ h ≦ 2i/√3)
あるいは
(√3d/2)(√2-1) ≦ h ≦ 2i/√3) (4)
となり、従って、
0.62a ≦ h ≦ 1.15i
あるいは
0.36d ≦ h ≦ 1.15i (5)
となる。
a = d/√3
とすることができ、(5)の2つの式は1つ
0.36d ≦ h ≦ 1.15i (6)
とすることができる。
0.93μm ≦ h ≦ 2.3μm (7)
であるので、h=1.2μmを選択した結果、駆動電流20mAの条件の基で、台形凸部p型GaN層6’が存在しない平坦の透明電極層、反射電極層の光半導体装置に比較して光出力が約14%(=8.03mW/7.00mW)向上した。また、順方向電圧はどちらも約4.0Vで差がなかった。
2:n型GaN層
3:活性層
4:p型GaN層
5:酸化シリコン層
6,6’:台形凸部p型GaN層
7:透明電極層
8:反射電極層
9、10、11:フォトレジスト層
12:トンネル層
21:支持体
22:接着層
23:n側電極層
Claims (11)
- 第1の導電型の第1の半導体層と、
該第1の半導体層上に設けられた活性層と、
該活性層上に設けられた第2の導電型の第2の半導体層と、
該第2の半導体層の一部に設けられた絶縁層と、
前記第2の半導体層の他部に設けられた前記第2の導電型の凸部半導体層と、
前記絶縁層及び前記凸部半導体層上に設けられた電極層と
を具備し、
前記凸部半導体層の先端部の前記第2の導電型のキャリア密度が前記凸部半導体層の底部の前記第2の導電型のキャリア密度より大きい光半導体装置。 - 前記凸部半導体層の先端部のキャリア密度が前記凸部半導体層の底部のキャリア密度の約4倍以上である請求項1に記載の光半導体装置。
- 前記第2の導電型のキャリア密度が前記凸部半導体層の底部から前記凸部半導体層の先端部に向かって段階的に増大した請求項1に記載の光半導体装置。
- 前記第2の導電型のキャリア密度が前記凸部半導体層の底部から前記凸部半導体層の先端部に向かって連続的に増大した請求項1に記載の光半導体装置。
- 前記凸部半導体層が台形形状断面を有する請求項1に記載の光半導体装置。
- 前記凸部半導体層が三角形状断面を有する請求項1に記載の光半導体装置。
- 前記第1の半導体層、前記活性層、前記第2の半導体層及び前記凸部半導体層がAlxInyGazN(0≦x≦1、0≦y≦1、0≦z≦1、x+y+z=1)で表わされるIII族窒化物よりなる請求項1に記載の光半導体装置。
- 前記絶縁層の屈折率が前記第1の半導体層、前記活性層、前記第2の半導体層の屈折率より小さい請求項1に記載の光半導体装置。
- 前記絶縁層が円形状もしくは多角形状をなしており、
前記凸部半導体層が前記絶縁層を囲んでいる請求項1に記載の光半導体装置。 - 前記絶縁層が三角格子状に配列されている請求項1に記載の光半導体装置。
- 前記凸部半導体層の厚さhが、
0.36d ≦ h ≦ 1.15i
但し、dは前記絶縁層の直径もしくは対角線の長さであって、1.0μm≦d≦4.0μm、
iは前記絶縁層間距離であって、1.5μm≦i≦3.0μm、
である請求項10に記載の光半導体装置。
Priority Applications (2)
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JP2009268527A JP5496623B2 (ja) | 2009-11-26 | 2009-11-26 | 光半導体装置 |
US12/953,932 US8288788B2 (en) | 2009-11-26 | 2010-11-24 | Optical semiconductor device having uneven semiconductor layer with non-uniform carrier density |
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JP2009268527A JP5496623B2 (ja) | 2009-11-26 | 2009-11-26 | 光半導体装置 |
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Publication Number | Publication Date |
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JP2011114123A true JP2011114123A (ja) | 2011-06-09 |
JP5496623B2 JP5496623B2 (ja) | 2014-05-21 |
Family
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JP (1) | JP5496623B2 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013030634A (ja) * | 2011-07-28 | 2013-02-07 | Showa Denko Kk | 半導体発光素子 |
KR20130026926A (ko) * | 2011-09-06 | 2013-03-14 | 엘지이노텍 주식회사 | 발광 소자 및 그 제조방법 |
JP2013197340A (ja) * | 2012-03-21 | 2013-09-30 | Stanley Electric Co Ltd | 半導体発光素子ウェハの製造方法、半導体発光素子ウェハ、及びサセプタ |
JP2015501526A (ja) * | 2011-09-30 | 2015-01-15 | オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツングOsram Opto Semiconductors GmbH | オプトエレクトロニクス半導体チップの製造方法およびオプトエレクトロニクス半導体チップ |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20130049894A (ko) * | 2011-11-07 | 2013-05-15 | 삼성전자주식회사 | 반도체 발광소자 및 그 제조방법 |
US9419194B2 (en) * | 2013-08-13 | 2016-08-16 | Palo Alto Research Center Incorporated | Transparent electron blocking hole transporting layer |
JP2015072751A (ja) * | 2013-10-01 | 2015-04-16 | 株式会社ジャパンディスプレイ | 有機el表示装置 |
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Family Cites Families (2)
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US6807213B1 (en) * | 1999-02-23 | 2004-10-19 | Mitsubishi Chemical Corporation | Semiconductor optical device apparatus |
JP2008098336A (ja) | 2006-10-11 | 2008-04-24 | Stanley Electric Co Ltd | 半導体発光素子およびその製造方法 |
-
2009
- 2009-11-26 JP JP2009268527A patent/JP5496623B2/ja not_active Expired - Fee Related
-
2010
- 2010-11-24 US US12/953,932 patent/US8288788B2/en not_active Expired - Fee Related
Patent Citations (7)
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JPH0897471A (ja) * | 1994-09-20 | 1996-04-12 | Toyoda Gosei Co Ltd | 3族窒化物半導体発光素子 |
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JP2007035846A (ja) * | 2005-07-26 | 2007-02-08 | Matsushita Electric Works Ltd | 半導体発光素子およびそれを用いる照明装置ならびに半導体発光素子の製造方法 |
JP2007095744A (ja) * | 2005-09-27 | 2007-04-12 | Matsushita Electric Works Ltd | 半導体発光素子およびそれを用いる照明装置ならびに半導体発光素子の製造方法 |
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US20110121312A1 (en) | 2011-05-26 |
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