JP5849215B2 - 紫外半導体発光素子 - Google Patents
紫外半導体発光素子 Download PDFInfo
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- JP5849215B2 JP5849215B2 JP2010140907A JP2010140907A JP5849215B2 JP 5849215 B2 JP5849215 B2 JP 5849215B2 JP 2010140907 A JP2010140907 A JP 2010140907A JP 2010140907 A JP2010140907 A JP 2010140907A JP 5849215 B2 JP5849215 B2 JP 5849215B2
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- 239000004065 semiconductor Substances 0.000 title claims description 199
- 150000004767 nitrides Chemical class 0.000 claims description 114
- 239000000758 substrate Substances 0.000 claims description 46
- 238000005253 cladding Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 307
- 238000000034 method Methods 0.000 description 19
- 238000000605 extraction Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 10
- 230000004888 barrier function Effects 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 6
- 238000000206 photolithography Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 5
- 229910002704 AlGaN Inorganic materials 0.000 description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000000137 annealing Methods 0.000 description 4
- 229910052733 gallium Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229910052594 sapphire Inorganic materials 0.000 description 4
- 239000010980 sapphire Substances 0.000 description 4
- VCZQFJFZMMALHB-UHFFFAOYSA-N tetraethylsilane Chemical compound CC[Si](CC)(CC)CC VCZQFJFZMMALHB-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000005566 electron beam evaporation Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 238000002109 crystal growth method Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 238000004151 rapid thermal annealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RGGPNXQUMRMPRA-UHFFFAOYSA-N triethylgallium Chemical compound CC[Ga](CC)CC RGGPNXQUMRMPRA-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-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
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- QBJCZLXULXFYCK-UHFFFAOYSA-N magnesium;cyclopenta-1,3-diene Chemical compound [Mg+2].C1C=CC=[C-]1.C1C=CC=[C-]1 QBJCZLXULXFYCK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- OMQSJNWFFJOIMO-UHFFFAOYSA-J zirconium tetrafluoride Chemical compound F[Zr](F)(F)F OMQSJNWFFJOIMO-UHFFFAOYSA-J 0.000 description 1
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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
- H10H20/814—Bodies having reflecting means, e.g. semiconductor Bragg reflectors
-
- 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
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
- H10H20/856—Reflecting means
-
- 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
-
- 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
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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
- H10H20/84—Coatings, e.g. passivation layers or antireflective coatings
- H10H20/841—Reflective coatings, e.g. dielectric Bragg reflectors
-
- 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
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Description
この紫外半導体発光素子において、前記凹部の深さ寸法を、前記p形コンタクト層の厚さが10nmとなる深さ寸法から、前記p形窒化物半導体層の厚さ寸法の範囲で設定してあることが好ましい。
この紫外半導体発光素子において、基板を備え、前記基板の一表面側に前記n形窒化物半導体層が形成され、前記n形窒化物半導体層の表面側に前記発光層が形成され、前記発光層の表面側に前記p形窒化物半導体層が形成されていることが好ましい。
以下、本実施形態の紫外半導体発光素子について図1を参照しながら説明する。
本実施形態の紫外半導体発光素子の基本構成は実施形態1と略同じであり、実施形態1ではメサ構造を設けていたのに対し、図2に示すように、実施形態1において説明した基板1(図1参照)がなく、n形窒化物半導体層3における発光層4側とは反対側の表面に、n電極6を形成してある点などが相違する。すなわち、本実施形態の紫外半導体発光素子は、いわゆる縦型注入構造となっている。なお、実施形態1と同様の構成要素には同一の符号を付して説明を省略する。
本実施形態の紫外半導体発光素子の基本構成は実施形態1と略同じであり、図3に示すように、反射膜9がp電極7上にまで延設されている点などが相違する。なお、実施形態1と同様の構成要素には同一の符号を付して説明を省略する。
3 n形窒化物半導体層
4 発光層
5 p形窒化物半導体層
5a p形クラッド層
5b p形コンタクト層
6 n電極
7 p電極
8 凹部
8a 内底面
9 反射膜
Claims (6)
- n形窒化物半導体層とp形窒化物半導体層との間に発光層を有するとともに、前記n形窒化物半導体層に接触するn電極と、前記p形窒化物半導体層に接触するp電極とを有し、前記p形窒化物半導体層が、前記発光層よりもバンドギャップが小さく前記p電極との接触がオーミック接触となるp形コンタクト層を少なくとも備えた紫外半導体発光素子であって、
前記p形窒化物半導体層は、前記p電極側から順に、前記p形コンタクト層、前記p形コンタクト層よりもバンドギャップが大きなp形クラッド層、を有し、
前記p形窒化物半導体層における前記発光層とは反対側の表面に、前記p電極の形成領域を避けて凹部が形成され、前記凹部の内底面に、前記発光層から放射される紫外光を反射する反射膜が形成されてなることを特徴とする紫外半導体発光素子。 - 前記p形窒化物半導体層は、前記凹部が複数形成されてなることを特徴とする請求項1記載の紫外半導体発光素子。
- 前記凹部の深さ寸法を、前記p形コンタクト層の厚さ寸法よりも大きく設定してあることを特徴とする請求項1又は2記載の紫外半導体発光素子。
- 前記凹部の深さ寸法を、前記p形コンタクト層の厚さが10nmとなる深さ寸法から、前記p形窒化物半導体層の厚さ寸法の範囲で設定してあることを特徴とする請求項1又は2記載の紫外半導体発光素子。
- 前記反射膜は、前記p電極上まで延設されてなることを特徴とする請求項1ないし請求項4のいずれか1項に記載の紫外半導体発光素子。
- 基板を備え、前記基板の一表面側に前記n形窒化物半導体層が形成され、前記n形窒化物半導体層の表面側に前記発光層が形成され、前記発光層の表面側に前記p形窒化物半導体層が形成されていることを特徴とする請求項1ないし請求項5のいずれか1項に記載の紫外半導体発光素子。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010140907A JP5849215B2 (ja) | 2010-06-21 | 2010-06-21 | 紫外半導体発光素子 |
PCT/JP2011/063931 WO2011162180A1 (ja) | 2010-06-21 | 2011-06-17 | 紫外半導体発光素子 |
KR1020127031106A KR20130009858A (ko) | 2010-06-21 | 2011-06-17 | 자외 반도체 발광 소자 |
EP11798064.9A EP2584616A4 (en) | 2010-06-21 | 2011-06-17 | SEMICONDUCTOR ULTRAVIOLET ELECTROLUMINESCENT ELEMENT |
CN201180029764.8A CN102947955B (zh) | 2010-06-21 | 2011-06-17 | 紫外半导体发光元件 |
US13/704,679 US9070847B2 (en) | 2010-06-21 | 2011-06-17 | Ultraviolet semiconductor light-emitting element that emits ultraviolet light from one surface side |
TW100121438A TWI455359B (zh) | 2010-06-21 | 2011-06-20 | 紫外線半導體發光元件 |
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JP2014243635A Division JP2015043468A (ja) | 2014-12-02 | 2014-12-02 | 紫外半導体発光素子 |
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JP5849215B2 true JP5849215B2 (ja) | 2016-01-27 |
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US (1) | US9070847B2 (ja) |
EP (1) | EP2584616A4 (ja) |
JP (1) | JP5849215B2 (ja) |
KR (1) | KR20130009858A (ja) |
CN (1) | CN102947955B (ja) |
TW (1) | TWI455359B (ja) |
WO (1) | WO2011162180A1 (ja) |
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JP5988568B2 (ja) * | 2011-11-14 | 2016-09-07 | Dowaエレクトロニクス株式会社 | 半導体発光素子およびその製造方法 |
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- 2011-06-17 CN CN201180029764.8A patent/CN102947955B/zh active Active
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US9070847B2 (en) | 2015-06-30 |
TWI455359B (zh) | 2014-10-01 |
EP2584616A1 (en) | 2013-04-24 |
WO2011162180A1 (ja) | 2011-12-29 |
EP2584616A4 (en) | 2015-11-18 |
KR20130009858A (ko) | 2013-01-23 |
US20130082297A1 (en) | 2013-04-04 |
TW201216510A (en) | 2012-04-16 |
CN102947955B (zh) | 2016-10-19 |
JP2012004501A (ja) | 2012-01-05 |
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