JP2006190980A - 窒化物半導体発光素子およびその製造方法 - Google Patents
窒化物半導体発光素子およびその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 154
- 150000004767 nitrides Chemical class 0.000 title claims abstract description 148
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 71
- 239000013078 crystal Substances 0.000 claims abstract description 53
- 238000000034 method Methods 0.000 claims description 38
- 239000000203 mixture Substances 0.000 claims description 23
- 238000005253 cladding Methods 0.000 claims description 17
- 238000005336 cracking Methods 0.000 abstract 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 17
- 229910004298 SiO 2 Inorganic materials 0.000 description 10
- 230000004888 barrier function Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005530 etching Methods 0.000 description 5
- 229910002704 AlGaN Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- -1 nitride compound Chemical class 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 238000001039 wet etching Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
【解決手段】本発明にかかる窒化物半導体発光素子の製造方法においては、まず、ストライプ状の溝部17が形成された窒化物半導体基板を用意する。溝部17に、基板表面に対して53.5度以上63.4度以下の傾きを有する結晶面16ができるように、溝部17の側壁を含む窒化物半導体基板10上に、窒化物半導体からなる下地層21を形成する。下地層21の上に、Alを含む下部クラッド層と、活性層と、Alを含む上部クラッド層からなる発光素子構造11を形成する。
【選択図】図4
Description
11 窒化物半導体からなる発光素子構造の層
12 リッジストライプ部
13 絶縁膜
14 p電極
15 n電極
16 結晶面
17 溝部(溝)
18 丘部(丘)
21 窒化物半導体からなる下地層
22 n型Al0.062Ga0.938N第1クラッド層
23 n型Al0.1Ga0.9N第2クラッド層
24 n型Al0.062Ga0.938N第3クラッド層
25 n型GaN光ガイド層
26 多重量子井戸構造活性層
27 p型Al0.3Ga0.7Nキャリアブロック層
28 p型GaN光ガイド層
29 p型Al0.1Ga0.9Nクラッド層
30 p型GaNコンタクト層
41 分割ライン
100 窒化物半導体基板の法線方向
101 下地層の法線方向
110 結晶面の法線方向
120 窒化物半導体基板もしくは下地層と結晶面との間の角度
130 異常成長の部分
140 うねりのような表面モフォロジーを表す。
Claims (13)
- ストライプ状の溝部が形成された窒化物半導体基板を用意する工程と、
前記溝部に、前記基板表面に対して53.5度以上63.4度以下の傾きを有する結晶面ができるように、前記溝部の側壁を含む前記窒化物半導体基板上に、窒化物半導体からなる下地層を形成する工程と、
前記下地層の上に、Alを含む下部クラッド層と、活性層と、Alを含む上部クラッド層を順次形成する工程とを具備することを特徴とする窒化物半導体発光素子の製造方法。 - 前記下地層のAl組成比は、前記下部クラッド層のAl組成比よりも小さいことを特徴とする請求項1に記載の窒化物半導体発光素子の製造方法。
- 前記下地層のAl組成比は5%以下であることを特徴とする請求項2に記載の窒化物半導体発光素子の製造方法。
- 前記下地層はGaNであることを特徴とする請求項1に記載の窒化物半導体発光素子の製造方法。
- 前記結晶面が{11−22}面を含んでいることを特徴とする請求項1に記載の窒化物半導体発光素子の製造方法。
- 前記下地層の層厚は、0.01μm以上2μm以下であることを特徴とする請求項1に記載の窒化物半導体発光素子の製造方法。
- 前記溝部の深さは、0.5μm以上20μm以下であることを特徴とする請求項1に記載の窒化物半導体発光素子の製造方法。
- 前記溝部の幅が5μm以上100μm以下であることを特徴とする請求項1に記載の窒化物半導体発光素子の製造方法。
- 窒化物半導体基板と、
前記窒化物半導体基板の上に設けられ、窒化物半導体からなる下地層と、
前記下地層の上に順に設けられた、Alを含む下部クラッド層と、活性層と、Alを含む上部クラッド層とを備えた窒化物半導体発光素子。 - 前記下地層のAl組成比は、前記下部クラッド層のAl組成比よりも小さいことを特徴とする請求項9に記載の窒化物半導体発光素子。
- 前記下地層のAl組成比は5%以下であることを特徴とする請求項10に記載の窒化物半導体発光素子。
- 前記下地層はGaNであることを特徴とする請求項11に記載の窒化物半導体発光素子。
- 前記下地層の層厚は、0.01μm以上1μm以下であることを特徴とする請求項9に記載の窒化物半導体発光素子。
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US11/296,532 US7410819B2 (en) | 2004-12-08 | 2005-12-08 | Nitride semiconductor light-emitting device and method for producing same |
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US7577173B2 (en) | 2007-02-26 | 2009-08-18 | Mitsubishi Electric Corporation | Semiconductor laser device having a low reflection film of stable reflectance |
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