JP6942261B1 - 光半導体装置の製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 116
- 230000003287 optical effect Effects 0.000 title claims description 90
- 238000004519 manufacturing process Methods 0.000 title claims description 61
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 238000005530 etching Methods 0.000 claims description 31
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 238000010030 laminating Methods 0.000 claims description 11
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 16
- 238000001312 dry etching Methods 0.000 description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
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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
- H01S5/227—Buried mesa structure ; Striped active layer
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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
- H01S5/2205—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 comprising special burying or current confinement layers
- H01S5/2222—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 comprising special burying or current confinement layers having special electric properties
- H01S5/2224—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 comprising special burying or current confinement layers having special electric properties semi-insulating semiconductors
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- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/305—Structure or shape of the active region; Materials used for the active region characterised by the doping materials used in the laser structure
- H01S5/3072—Diffusion blocking layer, i.e. a special layer blocking diffusion of dopants
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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
- H01S5/34306—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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- 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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- 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
- H01S5/2205—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 comprising special burying or current confinement layers
- H01S5/2222—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 comprising special burying or current confinement layers having special electric properties
- H01S5/2226—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 comprising special burying or current confinement layers having special electric properties semiconductors with a specific doping
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- Optics & Photonics (AREA)
- Geometry (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
図1は、本願の実施の形態1に係る光半導体装置101の構成を示す断面図である。図1に示すように、光半導体装置101は、面方位(110)のn型InP基板1(第一導電型の半導体)の表面に[011]方向に延在するメサストライプ8を形成している。メサストライプ8は、例えば幅W1が1.4μmである。
実施の形態1では、Feドープ半絶縁性InP層9を平坦化したが、実施の形態2では、平坦化を行わない場合について説明する。
実施の形態1および実施の形態2では、p型InPクラッド層4にp型InPクラッド層6を直接積層しない場合について説明したが、実施の形態3では、直接積層する場合について説明する。
実施の形態3では、Feドープ半絶縁性InP層9を平坦化したが、実施の形態4では、平坦化を行わない場合について説明する。
Claims (4)
- 第一導電型半導体基板の表面に、第一導電型クラッド層、活性層および第一の第二導電型クラッド層を順次積層した後に、さらにエッチングストップ層と第二の第二導電型クラッド層を順次積層して半導体層を形成する工程と、
前記半導体層をエッチングしてメサストライプを形成する工程と、
前記メサストライプの両側に埋め込み層を形成する工程と、
前記メサストライプの頂部および前記埋め込み層の表面に、第一導電型ブロック層を形成する工程と、
前記第一導電型ブロック層の前記活性層のストライプ横断面方向から見たときにおける中央部分に対応する領域を露出するマスクを形成した後、前記エッチングストップ層に達するまでエッチングして開口部を形成する工程と、
前記マスクと前記エッチングストップ層を除去する工程と、
前記開口部および前記第一導電型ブロック層の表面に第三の第二導電型クラッド層を積層した後、第二導電型コンタクト層を積層する工程と、
を含み、
前記第二の第二導電型クラッド層と前記活性層の間の前記活性層の表面に、前記第二の第二導電型クラッド層のキャリア濃度よりも低いキャリア濃度の前記第一の第二導電型クラッド層が形成され、前記第三の第二導電型クラッド層のキャリア濃度は、前記第二の第二導電型クラッド層のキャリア濃度よりも低く設定されたことを特徴とする光半導体装置の製造方法。 - 前記エッチングストップ層には第二導電型InGaAsP層を用い、前記マスクには第一導電型InGaAs層を用いることを特徴とする請求項1に記載の光半導体装置の製造方法。
- 第一導電型半導体基板の表面に、第一導電型クラッド層、活性層および第一の第二導電型クラッド層を順次積層した後に、さらに第二の第二導電型クラッド層を積層して半導体層を形成する工程と、
前記半導体層をエッチングしてメサストライプを形成する工程と、
前記メサストライプの両側に埋め込み層を形成する工程と、
前記メサストライプの頂部および前記埋め込み層の表面に、第一導電型ブロック層を形成する工程と、
前記第一導電型ブロック層の前記活性層のストライプ横断面方向から見たときにおける中央部分に対応する領域を露出するマスクを形成した後、前記第一導電型ブロック層と前記第二の第二導電型クラッド層をエッチングして開口部を形成する工程と、
前記マスクを除去する工程と、
前記開口部および前記第一導電型ブロック層の表面に第三の第二導電型クラッド層を積層した後、第二導電型コンタクト層を積層する工程と、
を含み、
前記第二の第二導電型クラッド層と前記活性層の間の前記活性層の表面に、前記第二の第二導電型クラッド層のキャリア濃度よりも低いキャリア濃度の前記第一の第二導電型クラッド層が形成され、前記第三の第二導電型クラッド層のキャリア濃度は、前記第二の第二導電型クラッド層のキャリア濃度よりも低く設定されたことを特徴とする光半導体装置の製造方法。 - 前記埋め込み層を形成する工程の後に、前記埋め込み層を平坦化する工程を含むことを特徴とする請求項1から請求項3のいずれか1項に記載の光半導体装置の製造方法。
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JPH0220085A (ja) * | 1988-07-08 | 1990-01-23 | Nec Corp | 半導体レーザ装置 |
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JP2010157707A (ja) * | 2008-12-01 | 2010-07-15 | Furukawa Electric Co Ltd:The | 光半導体装置および光ファイバ増幅器用励起光源 |
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- 2020-01-28 WO PCT/JP2020/002883 patent/WO2021152686A1/ja active Application Filing
- 2020-01-28 CN CN202080094364.4A patent/CN115023869A/zh active Pending
- 2020-01-28 US US17/787,893 patent/US20230045980A1/en active Pending
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JPH0279486A (ja) * | 1988-09-14 | 1990-03-20 | Sharp Corp | 半導体レーザ素子 |
JPH03227089A (ja) * | 1990-01-31 | 1991-10-08 | Nec Corp | 半導体レーザ |
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US20230045980A1 (en) | 2023-02-16 |
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