JP5165002B2 - 半導体デバイスの製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 83
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 230000003287 optical effect Effects 0.000 claims description 47
- 239000000758 substrate Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 11
- 239000010410 layer Substances 0.000 description 204
- 238000005253 cladding Methods 0.000 description 25
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- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 4
- IBEFSUTVZWZJEL-UHFFFAOYSA-N trimethylindium Chemical compound C[In](C)C IBEFSUTVZWZJEL-UHFFFAOYSA-N 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 3
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- RBFQJDQYXXHULB-UHFFFAOYSA-N arsane Chemical compound [AsH3] RBFQJDQYXXHULB-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 2
- RGGPNXQUMRMPRA-UHFFFAOYSA-N triethylgallium Chemical compound CC[Ga](CC)CC RGGPNXQUMRMPRA-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010282 TiON Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 239000002356 single layer Substances 0.000 description 1
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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
- H01S5/34346—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 characterised by the materials of the barrier layers
- H01S5/34373—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 characterised by the materials of the barrier layers based on InGa(Al)AsP
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Description
図1(a)〜図1(e)は、本発明の第1の実施の形態に係る半導体デバイス100の製造方法を示す製造工程図である。図1(a)〜図1(e)においては、模式的な断面図が示されている。図1(a)に示すように、n型InPからなる半導体基板110(結合面は{100})上にn型InPからなるバッファ層120を成長させる。具体的には、半導体基板110を加熱し、成長温度630℃で、0.1μm程度のバッファ層120を成長させる。なお、成長温度とは、層を成長させる際の基板温度をいう。したがって、図1(a)の工程においては、成長温度は、半導体基板110の温度のこという。
続いて、第2の実施の形態に係る半導体デバイス100aについて説明する。図2は、半導体デバイス100aの模式的断面図である。図2に示すように、半導体デバイス100aは、半導体基板110上に、バッファ層120、低熱伝導率層130、クラッド層140、光導波路層150およびクラッド層160を順に成長させた構造を有する。クラッド層160は、上面中央部に凸部を有している。この凸部は、光導波路層150の長さ方向に伸びるストライプ形状を有している。クラッド層160上には、絶縁層190が設けられている。また、クラッド層160の凸部上方の絶縁層190上に、ヒータ180が設けられている。
続いて、第3の実施の形態に係る半導体レーザチップ200について説明する。半導体レーザチップ200には、第1の実施の形態に係る半導体デバイス100が組み込まれている。図3は半導体レーザチップ200の全体構成を示す斜視図であり、図4(a)は半導体レーザチップ200の平面図であり、図4(b)は図4(a)のA−A線断面図である。以下、図3、図4(a)および図4(b)を参照しつつ半導体レーザチップ200の説明を行う。
実施例1においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度680℃において1.0μm成長させた。
実施例2においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度680℃において1.5μm成長させた。
実施例3においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度680℃において1.8μm成長させた。
実施例4においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度680℃において2.0μm成長させた。
実施例5においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度700℃において2.0μm成長させた。
実施例6においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度730℃において2.0μm成長させた。
実施例7においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度750℃において2.0μm成長させた。
実施例8においては、InP層上に、In0.91Al0.09As0.20P0.80層を、成長温度680℃において1.0μm成長させた。
実施例9においては、InP層上に、In0.63Al0.37As0.80P0.20層を、成長温度680℃において1.0μm成長させた。
実施例10においては、InP基板({100}面+0.08度)上に、In0.80Al0.20As0.50P0.50層を、成長温度680℃において1.5μm成長させた。
実施例11においては、InP基板({100}面−0.08度)上に、In0.80Al0.20As0.50P0.50層を、成長温度700℃において1.5μm成長させた。
実施例12においては、InP層上に、In0.76Ga0.08Al0.16As0.50P0.50層を、成長温度680℃において2.0μm成長させた。
比較例1においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度630℃において0.5μm成長させた。
比較例2においては、InP層上に、In0.76Al0.24As0.50P0.50層を、成長温度630℃において1.0μm成長させた。
実施例1〜12および比較例1,2に係るInGaAlAsP層およびInAlAsP層の表面を微分干渉顕微鏡で観察した。図5(a)〜図8(d)は、観察された像を写真撮影したものである。図5(a)〜図8(d)における写真像は、濃淡の分布が均一であるほど、表面の平坦度が高いことを示している。
Claims (11)
- InP半導体層の表面に、成長温度が680℃以上で厚みが1.0μm以上のInAlGaAsP層を成長させる成長工程を含み、
前記InAlGaAsPのInAlGaにおけるGaの組成比Xが0≦X≦0.08であることを特徴とする半導体デバイスの製造方法。 - 前記InAlGaAsP層上に、光導波路層を成長させる工程をさらに含むことを特徴とする請求項1記載の半導体デバイスの製造方法。
- 前記光導波路層と前記InAlGaAsP層との間には、1μm以上の層が介在することを特徴とする請求項2記載の半導体デバイスの製造方法。
- 前記InAlGaAsP層の成長温度は、700℃以上であることを特徴とする請求項1記載の半導体デバイスの製造方法。
- 前記InAlGaAsP層の成長温度は、730℃以上であることを特徴とする請求項1記載の半導体デバイスの製造方法。
- 前記InAlGaAsP層の成長温度は、750℃以下であることを特徴とする請求項1記載の半導体デバイスの製造方法。
- 前記InAlGaAsPのGaの組成比Xは0であり、かつ、InAlにおけるAlの組成比Yは、0.09≦Y≦0.37であることを特徴とする請求項1記載の半導体デバイスの製造方法。
- 前記InAlGaAsPのGaの組成比Xは0であり、かつ、AsPにおけるPの組成比Zは、0.20≦Z≦0.80であることを特徴とする請求項1記載の半導体デバイスの製造方法。
- 前記InP半導体層は、{100}±0.08度の面を有することを特徴とする請求項1記載の半導体デバイスの製造方法。
- 前記光導波路層の上に、ヒータを配置する工程をさらに含むことを特徴とする請求項2記載の半導体デバイスの製造方法。
- 前記InP半導体層は、半導体基板上に成長されてなり、前記半導体基板の表面におけるエッチピット密度は、2000個/cm2以下であることを特徴とする請求項1記載の半導体デバイスの製造方法。
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Citations (4)
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JPH1065263A (ja) * | 1996-08-20 | 1998-03-06 | Fujitsu Ltd | 半導体レーザ及びその製造方法 |
JP2000216500A (ja) * | 1999-01-21 | 2000-08-04 | Hitachi Ltd | 半導体光素子、半導体光素子アレイ、および、これらを用いた光通信システム |
JP2004319760A (ja) * | 2003-04-16 | 2004-11-11 | Hitachi Ltd | 化合物半導体素子及びそれを用いた半導体モジュール |
JP2007273644A (ja) * | 2006-03-30 | 2007-10-18 | Eudyna Devices Inc | 光半導体装置、レーザチップおよびレーザモジュール |
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JP3129112B2 (ja) * | 1994-09-08 | 2001-01-29 | 住友電気工業株式会社 | 化合物半導体エピタキシャル成長方法とそのためのInP基板 |
JPH0936494A (ja) * | 1995-07-21 | 1997-02-07 | Fujitsu Ltd | 化合物半導体装置の製造方法 |
US6614821B1 (en) * | 1999-08-04 | 2003-09-02 | Ricoh Company, Ltd. | Laser diode and semiconductor light-emitting device producing visible-wavelength radiation |
US7058246B2 (en) * | 2001-10-09 | 2006-06-06 | Infinera Corporation | Transmitter photonic integrated circuit (TxPIC) chip with enhanced power and yield without on-chip amplification |
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2009
- 2009-02-05 WO PCT/JP2009/051960 patent/WO2009101892A1/ja active Application Filing
- 2009-02-05 JP JP2009553403A patent/JP5165002B2/ja active Active
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2010
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JPH1065263A (ja) * | 1996-08-20 | 1998-03-06 | Fujitsu Ltd | 半導体レーザ及びその製造方法 |
JP2000216500A (ja) * | 1999-01-21 | 2000-08-04 | Hitachi Ltd | 半導体光素子、半導体光素子アレイ、および、これらを用いた光通信システム |
JP2004319760A (ja) * | 2003-04-16 | 2004-11-11 | Hitachi Ltd | 化合物半導体素子及びそれを用いた半導体モジュール |
JP2007273644A (ja) * | 2006-03-30 | 2007-10-18 | Eudyna Devices Inc | 光半導体装置、レーザチップおよびレーザモジュール |
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US20100297796A1 (en) | 2010-11-25 |
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