JPWO2014068814A1 - 半導体発光装置およびその製造方法 - Google Patents
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- 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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- H01L23/53214—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being aluminium
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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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Abstract
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、III−V族半導体混晶である第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2層および第3層はストライプ状に加工されて成るリッジに含まれ、且つ該第2層は該リッジの裾部に位置し、
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。 - 前記第3層は、前記第2層よりもAl組成が小さい層が複数積層された積層膜であり、前記D3は当該積層膜の合計膜厚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2層の側壁の傾斜は、前記第2層の下部の方が、前記第2層の上部よりも緩やか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D2は、200nm以上、500nm以下であることを特徴とする請求項1から3の何れか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から4の何れかに記載の半導体発光装置。
- 前記第3層から前記第2層の上部は非選択的エッチングによりストライプ状に加工され、前記第2層の下部は選択的エッチングによりストライプ状に加工されたことを特徴とする請求項1から5の何れかに記載の半導体発光装置。
- 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6に記載の半導体発光装置。
- 基板上に、III−V族半導体混晶である第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3層から第2層の上部を非選択的エッチングによりストライプ状に加工する工程と、前記第2層の下部を選択的エッチングによりストライプ状に加工する工程とを備え、
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。 - 前記ストライプ加工により形成される前記第2層の側壁の傾斜は、前記下部の方が、前記上部よりも緩やかであることを特徴とする請求項8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8または9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8から10の何れか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8から11の何れかに記載の半導体発光装置の製造方法。
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JP2004228340A (ja) * | 2003-01-23 | 2004-08-12 | Sony Corp | 半導体レーザ素子及びその製造方法 |
WO2005124952A1 (ja) * | 2004-06-18 | 2005-12-29 | Sony Corporation | 半導体発光装置およびその製造方法 |
WO2006077766A1 (ja) * | 2005-01-18 | 2006-07-27 | Matsushita Electric Industrial Co., Ltd. | 半導体レーザ装置及びその製造方法 |
JP2010245491A (ja) * | 2009-03-17 | 2010-10-28 | Qd Laser Inc | 半導体レーザ |
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