JP6178990B2 - 半導体発光装置およびその製造方法 - Google Patents
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- H01S5/00—Semiconductor lasers
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
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- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
- H01S5/3211—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures characterised by special cladding layers, e.g. details on band-discontinuities
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- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/34—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers
- H01S5/343—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
- H01S5/34313—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser with a well layer having only As as V-compound, e.g. AlGaAs, InGaAs
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/53204—Conductive materials
- H01L23/53209—Conductive materials based on metals, e.g. alloys, metal silicides
- H01L23/53214—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being aluminium
- H01L23/53223—Additional layers associated with aluminium layers, e.g. adhesion, barrier, cladding layers
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- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
- H01S5/3211—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures characterised by special cladding layers, e.g. details on band-discontinuities
- H01S5/3215—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures characterised by special cladding layers, e.g. details on band-discontinuities graded composition cladding layers
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- Semiconductor Lasers (AREA)
Description
2 n型AlGaInPクラッド層
3 GaAs/AlGaAs活性層
4 p型AlGaInPクラッド層第1層
5 p型AlGaInPクラッド層第2層
6 p型AlGaInPクラッド層第3層
7 p型AlGaInP中間層
8 p型GaAsコンタクト層
9 誘電体膜
10 p側電極
11 n側電極
12 マスク
13 側壁保護膜
Claims (12)
- 基板上に、第1導電型クラッド層と、活性層と、第2導電型クラッド層とを有し、
前記第2導電型クラッド層は、活性層に近い順から第1層、第2層、第3層を含む少なくとも3層以上の積層構造で構成され、
前記第1導電型クラッド層、前記第1層、前記第2層及び前記第3層は、AlGaInP系半導体混晶であり、
前記第2層及び前記第3層は、ストライプ状のリッジであり、
前記第3層の側壁及び前記第2層の上部の側壁は、前記基板に対して垂直であり、
前記第2層の下部の側壁は、前記基板側において前記第2層の上部の側壁より側方に広がり、且つ前記第2層の上部の側壁よりも緩やかな傾斜を有し、
前記第1層の表面は、前記リッジの両脇の平坦部であり、
前記第1層、第2層、第3層のAl組成をX1、X2、X3とすると、
X2>X1、X3
の関係を満たし、
前記第1層、第2層、第3層の膜厚をD1、D2、D3とすると、
D2<D3
の関係を満たすことを特徴とする半導体発光装置。 - 前記D2は、200nm以上、500nm以下であることを特徴とする請求項1に記載の半導体発光装置。
- 前記第1層、第2層は共にAlGaInPからなり、前記X1が0.35以下、前記X2が0.55以上であることを特徴とする請求項1または2に記載の半導体発光装置。
- 前記X2は前記X1の2倍以上であることを特徴とする請求項3に記載の半導体発光装置。
- 前記X3は前記X1と同じであることを特徴とする請求項1〜4のいずれか1項に記載の半導体発光装置。
- 基板上に、第1導電型クラッド層と、活性層と、該活性層に近い順から第1層、第2層、第3層を含む少なくとも3層以上の積層構造からなる第2導電型クラッド層とを形成する工程と、
前記第2層及び前記第3層に対してエッチングを行い、ストライプ状のリッジを形成するリッジ形成工程とを備え、
前記リッジ形成工程は、
前記第3層及び前記第2層の上部に対してエッチングを行い、前記第3層の側壁及び前記第2層の上部の側壁が前記基板に対して垂直となるよう加工する第1エッチング工程と、
前記第2層の下部をエッチングして、前記第2層の下部の側壁が、前記基板側において前記第2層の上部の側壁より側方に広がり、且つ、前記第2層の上部の側壁よりも緩やかな傾斜を有するように加工する第2エッチング工程とを有し、
前記第1導電型クラッド層及び前記第2導電型クラッド層は、AlGaInP系半導体混晶であり、
前記第1層、第2層、第3層のAl組成をX1、X2、X3とすると、
X2>X1、X3
の関係を満たし、
前記第1層、第2層、第3層の膜厚をD1、D2、D3とすると、
D2<D3
の関係を満たすことを特徴とする半導体発光装置の製造方法。 - 前記第1エッチング工程の後に、前記第3層の側壁及び前記第2層の上部の側壁に保護膜を形成する工程を備え、前記第2エッチング工程は、前記第3層の側壁及び前記第2層の上部の側壁が前記保護膜に覆われた状態で行われることを特徴とする請求項6に記載の半導体発光装置の製造方法。
- 前記D2は、200nm以上、500nm以下であることを特徴とする請求項6または7に記載の半導体発光装置の製造方法。
- 前記第1層、第2層は共にAlGaInPからなり、前記X1が0.35以下、前記X2が0.55以上であることを特徴とする請求項6〜8のいずれか1項に記載の半導体発光装置の製造方法。
- 前記X2は前記X1の2倍以上であることを特徴とする請求項9に記載の半導体発光装置の製造方法。
- 前記第1エッチング工程において、前記第3層及び前記第2層の上部に対して非選択的エッチングが行われ、前記第2エッチング工程において、前記第2層の下部に対して選択的エッチングが行われることを特徴とする請求項6〜10のいずれか1項に記載の半導体発光装置の製造方法。
- 前記非選択的エッチングはドライエッチングであり、前記選択的エッチングはウェットエッチングであることを特徴とする請求項11に記載の半導体発光装置の製造方法。
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JPH05121829A (ja) * | 1991-10-24 | 1993-05-18 | Sony Corp | 半導体レーザ |
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US5436193A (en) * | 1993-11-02 | 1995-07-25 | Xerox Corporation | Method of fabricating a stacked active region laser array |
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US20070091956A1 (en) | 2003-01-23 | 2007-04-26 | Yoshifumi Sato | Semiconductor laser element and method of fabrication thereof |
US7874908B2 (en) | 2003-03-03 | 2011-01-25 | Igt | Method and apparatus for payouts determined based on a set completion game |
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JP4551121B2 (ja) * | 2004-05-24 | 2010-09-22 | シャープ株式会社 | 半導体レーザ装置 |
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KR20060038057A (ko) * | 2004-10-29 | 2006-05-03 | 삼성전기주식회사 | 반도체 레이저 소자 및 그 제조 방법 |
JP4755090B2 (ja) | 2005-01-18 | 2011-08-24 | パナソニック株式会社 | 半導体レーザ装置及びその製造方法 |
JP4261592B2 (ja) * | 2007-04-16 | 2009-04-30 | 三菱電機株式会社 | 窒化物半導体発光素子 |
JP2009170895A (ja) * | 2007-12-18 | 2009-07-30 | Rohm Co Ltd | 窒化物半導体装置及び半導体レーザ |
JP2010245491A (ja) * | 2009-03-17 | 2010-10-28 | Qd Laser Inc | 半導体レーザ |
JP2013074002A (ja) * | 2011-09-27 | 2013-04-22 | Sony Corp | 発光素子及びその製造方法 |
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JP7134018B2 (ja) | 2018-08-17 | 2022-09-09 | 立川ブラインド工業株式会社 | 揺れ抑制装置 |
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