JP6206247B2 - 半導体装置の製造方法 - Google Patents
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- 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
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- H01S5/2054—Methods of obtaining the confinement
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- H01S5/2086—Methods of obtaining the confinement using special etching techniques lateral etch control, e.g. mask induced
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- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
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- H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
- H01S5/3202—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures grown on specifically orientated substrates, or using orientation dependent growth
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- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
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- H01S5/34306—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 emitting light at a wavelength longer than 1000nm, e.g. InP based 1300 and 1500nm lasers
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Description
本発明の実施の形態1に係る半導体装置の製造方法では、リッジストライプ形状を有するレーザ部の左右に電流ブロック層として機能する化合物半導体層を備えた半導体装置を形成する。まずレーザ部を形成する。図1は、レーザ部18を示す断面図である。基板10はInPで形成されている。基板10の一部に活性層12が形成されている。活性層12は、InGaAsP量子井戸層とInGaAsPバリア層が交互に繰り返し積層した多重量子井戸構造となっている。活性層12の上にInPを材料とする上部半導体層14が形成されている。
実施の形態1では化合物半導体層として電流ブロック層を形成したが、実施の形態2では化合物半導体層として光変調器を形成する。つまり、実施の形態2に係る半導体装置の製造方法は、光変調器付きレーザダイオードを形成するものである。まず、レーザ部形成工程により、図10に示すレーザ部18を形成する。
実施の形態3に係る半導体装置の製造方法では、基板にレーザダイオード、光変調器、及び光導波路を形成する。まず、レーザ部形成工程により、図14に示すレーザ部18を形成する。次いで、基板10に光変調器100を形成する。光変調器100は、最上層に、InGaAsで形成されたマスク102を有している。
実施の形態4に係る半導体装置の製造方法では、マルチモード干渉(MMI:Multi−Mode Interference)を利用した光合分波器を形成する。図18は、実施の形態4に係る半導体装置の平面図である。この半導体装置は、リッジストライプ150と、リッジストライプ150を埋め込む化合物半導体層152を備えている。リッジストライプ150は左側と中央と右側で形状が異なっている。つまり、リッジストライプ150は、左側で1本であり、中央で幅が最大となり、右側で2本に分岐する。なお、リッジストライプは光の伝達効率を最適化するために別の形状としてもよい。
つまり、レーザ部18は、マスク16、上部半導体層14、及び活性層12を有する限り様々な変形をなし得る。例えば、上部半導体層14は、クラッド層を最上層に備える複数の半導体層で形成してもよい。
Claims (7)
- 基板の一部に、活性層と、前記活性層の上に形成された上部半導体層と、前記上部半導体層の上に形成されたマスクとを備えるレーザ部を形成するレーザ部形成工程と、
Inを含有する材料で、前記レーザ部の側面に接し、前記レーザ部と接する部分に凸部を有する化合物半導体層を形成する半導体層形成工程と、
臭化水素酸と酢酸を含むエッチャントによって、前記凸部を除去し、前記化合物半導体層を平坦にするウェットエッチング工程と、を備え、
前記ウェットエッチング工程によって、前記マスクの下の前記上部半導体層に(111)A面が形成されることを特徴とする半導体装置の製造方法。 - 前記化合物半導体層は、前記レーザ部の(011)面又は(0−1−1)面に接し、
前記エッチャントは、前記臭化水素酸と前記酢酸に加えて、酸化剤を含むことを特徴とする請求項1に記載の半導体装置の製造方法。 - 前記上部半導体層はInPで形成され、
前記化合物半導体層は、InP、AlInP、InGaP、AlGaInP、InGaAsP、InAs、InGaAs、AlInAs、AlGaInAs、GaInNAsのいずれか1つで形成されたことを特徴とする請求項1又は2に記載の半導体装置の製造方法。 - 前記マスクは、前記ウェットエッチング工程で前記マスクのエッチ速度が前記凸部のエッチ速度より遅くなる材料で形成されることを特徴とする請求項1〜3のいずれか1項に記載の半導体装置の製造方法。
- 前記マスクはエピタキシャル層で形成されたことを特徴とする請求項4に記載の半導体装置の製造方法。
- 前記ウェットエッチング工程後の前記化合物半導体層の表面には(100)面が露出することを特徴とする請求項1〜5のいずれか1項に記載の半導体装置の製造方法。
- 前記化合物半導体層は、電流ブロック層、光変調器、光導波路、光結合器、光増幅器、EA変調器、又は位相変調器を構成することを特徴とする請求項1〜6のいずれか1項に記載の半導体装置の製造方法。
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JP2014035359A JP6206247B2 (ja) | 2014-02-26 | 2014-02-26 | 半導体装置の製造方法 |
US14/247,309 US9153942B2 (en) | 2014-02-26 | 2014-04-08 | Method of manufacturing semiconductor device |
TW103125955A TWI541906B (zh) | 2014-02-26 | 2014-07-30 | 半導體裝置之製造方法 |
CN201410708671.3A CN104868360B (zh) | 2014-02-26 | 2014-11-28 | 半导体装置的制造方法 |
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CN108508518B (zh) * | 2018-04-11 | 2021-06-01 | 青岛海信宽带多媒体技术有限公司 | 确定光栅掩埋层工艺参数的方法 |
US11158995B2 (en) * | 2018-06-01 | 2021-10-26 | Visual Photonics Epitaxy Co., Ltd. | Laser diode with defect blocking layer |
US20210313772A1 (en) * | 2018-11-01 | 2021-10-07 | Mitsubishi Electric Corporation | Optical semiconductor device and method for manufacturing optical semiconductor device |
WO2021152686A1 (ja) * | 2020-01-28 | 2021-08-05 | 三菱電機株式会社 | 光半導体装置とその製造方法 |
TWI734567B (zh) * | 2020-07-24 | 2021-07-21 | 國立臺灣大學 | 用於產生兆赫輻射的裝置的製造方法 |
KR102703921B1 (ko) * | 2022-08-31 | 2024-09-10 | 주식회사 오이솔루션 | 레이저 소자 제조방법 |
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JPS62165384A (ja) * | 1986-01-16 | 1987-07-21 | Fujitsu Ltd | 半導体発光装置の製造方法 |
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JPH11202275A (ja) * | 1998-01-07 | 1999-07-30 | Oki Electric Ind Co Ltd | リッジ導波路型半導体光機能素子およびその製造方法 |
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