JP6790364B2 - 光半導体装置 - Google Patents
光半導体装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 171
- 230000003287 optical effect Effects 0.000 title claims description 116
- 239000010410 layer Substances 0.000 claims description 180
- 239000000758 substrate Substances 0.000 claims description 85
- 238000009826 distribution Methods 0.000 claims description 38
- 239000012792 core layer Substances 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 8
- 238000005253 cladding Methods 0.000 claims description 6
- 230000004048 modification Effects 0.000 description 16
- 238000012986 modification Methods 0.000 description 16
- 239000013078 crystal Substances 0.000 description 9
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000005394 sealing glass Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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Description
図1は、実施の形態1における光半導体装置100の断面図である。ボディ部10は、表面上に基準面11を備える。基準面11には、ブロック部12が配置される。ブロック部12は、第1側面13を有する。第1側面13は、ブロック部12の対向する側面に向かって傾斜している。ブロック部12には、第1側面13と裏面が接するように実装基板14が配置される。実装基板14の表面は、第1側面13と平行である。また、実装基板14はセラミックス基板である。実装基板14の表面には半導体レーザー116が配置される。半導体レーザー116は、前端面117から前端面側出射光18を出射する。また、半導体レーザー116は、後端面115から後端面側出射光20を出射する。
図25は、実施の形態2における光半導体装置700の断面図である。光半導体装置700は、ブロック部412を備える。ブロック部412は、基準面11に対して垂直な第1側面413を有する。ブロック部412には、第1側面413と裏面が接するように実装基板714が配置される。実装基板714の表面には半導体レーザー116が実装される。実装基板714の表面は、前端面側出射光18が基準面11に対して垂直な方向を向くように傾斜した構造を備える。
図26は、実施の形態3における光半導体装置800の断面図である。光半導体装置800は、実施の形態2と同様にブロック部412を備える。ブロック部412には、第1側面413と裏面が接するように実装基板814が配置される。実装基板814の表面には半導体レーザー816が実装される。本実施の形態では、第1側面413、実装基板814の裏面および表面は互いに平行である。
Claims (21)
- 前端面側に前端面側出射光を出射し、後端面側に後端面側出射光を出射する半導体レーザーと、
前記半導体レーザーを表面に備えた実装基板と、
を備え、
前記後端面側出射光は、前記後端面から離れるほど前記実装基板から遠ざかる出射光軸を持って出射され、
前記半導体レーザーは、
半導体基板と、活性層と、前記半導体基板と前記活性層の間に配置された第1クラッド層と、前記活性層の前記第1クラッド層と反対側の面に配置された第2クラッド層と、を備えたレーザー部と、
前記活性層よりも上部に位置する上部半導体層の屈折率が、前記活性層よりも下部に位置する下部半導体層の屈折率よりも大きい光導波部と、
を備え、
前記光導波部は、前記レーザー部の両端の出射面のうち前記後端面に隣接して設けられ、
前記光導波部は前記活性層に隣接した位置にコア層を備え、
前記第1クラッド層と前記第2クラッド層は屈折率が同じである事を特徴とする光半導体装置。 - 前記後端面側出射光の出射光軸上に受光面を有するフォトダイオードを備えることを特徴とする請求項1に記載の光半導体装置。
- 基準面を有するボディ部を備え、
前記フォトダイオードは前記基準面に配置され、
前記前端面側出射光は、前記前端面から離れるほど前記実装基板から遠ざかる出射光軸を持って出射され、
前記実装基板の表面は、前記前端面側出射光が、前記基準面と垂直な方向を向くように傾斜した構造を備えることを特徴とする請求項2に記載の光半導体装置。 - 前記実装基板は、裏面が前記基準面と垂直になるように配置されることを特徴とする請求項3に記載の光半導体装置。
- 基準面を有するボディ部を備え、
前記フォトダイオードは前記基準面に配置され、
前記実装基板の表面は、前記基準面に対して垂直であり、
前記前端面側出射光は、前記基準面と垂直な出射光軸を持って出射される事を特徴とする請求項2に記載の光半導体装置。 - 前記半導体レーザーは活性層を備え、
前記前端面側出射光の出射光軸と前記活性層がなす角度と、前記後端面側出射光の出射光軸と前記活性層がなす角度と、が異なることを特徴とする請求項3〜5の何れか1項に記載の光半導体装置。 - 前記ボディ部に固定されたリードピンを備え、
前記リードピンは、前記基準面から突出した先端部分が前記実装基板の表面と面接触するように、屈折した構造を備えることを特徴とする請求項3〜6の何れか1項に記載の光半導体装置。 - 前記ボディ部に固定されたリードピンを備え、
前記リードピンは、前記基準面から突出した先端部分の上面が前記基準面と対向する前記実装基板の側面と面接触するように、前記先端部分が屈折した構造を備えることを特徴とする請求項3〜6の何れか1項に記載の光半導体装置。 - 前記ボディ部に固定されたリードピンを備え、
前記実装基板は、前記基準面から突出した前記リードピンの先端部分に沿うようにくり貫かれた切欠き部分を備え、
前記リードピンの前記先端部分は、前記切欠き部分に配置されることを特徴とする請求項3〜6の何れか1項に記載の光半導体装置。 - 前記実装基板は、前記半導体レーザーと前記リードピンの間を接続するパターン配線を備えることを特徴とする請求項7〜9の何れか1項に記載の光半導体装置。
- 前記光導波部が前記前端面に隣接して設けられていることを特徴とする請求項1〜10の何れか1項に記載の光半導体装置。
- 前記コア層は、前記活性層の屈折率以下の屈折率を持つことを特徴とする請求項1〜11の何れか1項に記載の光半導体装置。
- 前記上部半導体層は、
前記半導体基板よりも屈折率が大きい第1光分布変形層と、
前記コア層と前記第1光分布変形層との間に配置され、前記コア層および前記第1光分布変形層よりも屈折率が小さい第1半導体層と、
を備えることを特徴とする請求項12に記載の光半導体装置。 - 前記第1光分布変形層は前記屈折率がステップ状に変化する構造を備えることを特徴とする請求項13に記載の光半導体装置。
- 前記第1光分布変形層は前記屈折率が連続して変化する構造を備えることを特徴とする請求項13または14に記載の光半導体装置。
- 前記レーザー部は、
N型およびP型のどちらか一方である第1型のInPからなる前記半導体基板と、
前記半導体基板の表面に配置された前記第1型のInPからなる前記第1クラッド層と、
前記第1クラッド層の表面に配置され、InPよりも屈折率の大きいAlGaInAs化合物からなる前記活性層と、
前記活性層の表面に配置され、N型およびP型の他方である第2型のInPからなる前記第2クラッド層と、
を備え、
前記第1光分布変形層は、InPより屈折率の大きいInGaAsP化合物で構成される層を備えることを特徴とする請求項13〜15の何れか1項に記載の光半導体装置。 - 前記下部半導体層は、
前記半導体基板よりも屈折率が小さい第2光分布変形層を備えることを特徴とする請求項13〜16の何れか1項に記載の光半導体装置。 - 前記第2光分布変形層は前記屈折率がステップ状に変化する構造を備えることを特徴とする請求項17に記載の光半導体装置。
- 前記第2光分布変形層は前記屈折率が連続して変化する構造を備えることを特徴とする請求項17または18に記載の光半導体装置。
- 前記第2光分布変形層は、InPより屈折率の小さいInGaAsP化合物で構成される層を備えることを特徴とする請求項17〜19の何れか1項に記載の光半導体装置。
- 前記半導体レーザーは、表面および裏面の少なくともどちらか一方に、前記レーザー部を覆い、前記光導波部を露出された電極を備えることを特徴とする請求項1〜20の何れか1項に記載の光半導体装置。
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