JP5169972B2 - 窒化物半導体装置の製造方法 - Google Patents
窒化物半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 74
- 150000004767 nitrides Chemical class 0.000 title claims description 68
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 86
- 229910021529 ammonia Inorganic materials 0.000 claims description 43
- 239000012535 impurity Substances 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 19
- 150000002429 hydrazines Chemical class 0.000 claims description 17
- 150000002902 organometallic compounds Chemical class 0.000 claims description 16
- 238000005253 cladding Methods 0.000 claims description 15
- 229910002704 AlGaN Inorganic materials 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 67
- 239000011777 magnesium Substances 0.000 description 46
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 36
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 34
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 34
- 239000002994 raw material Substances 0.000 description 30
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 26
- 239000013078 crystal Substances 0.000 description 24
- 239000012159 carrier gas Substances 0.000 description 23
- 229910001873 dinitrogen Inorganic materials 0.000 description 23
- DIIIISSCIXVANO-UHFFFAOYSA-N 1,2-Dimethylhydrazine Chemical compound CNNC DIIIISSCIXVANO-UHFFFAOYSA-N 0.000 description 20
- 239000001257 hydrogen Substances 0.000 description 20
- 229910052739 hydrogen Inorganic materials 0.000 description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 19
- 229910052799 carbon Inorganic materials 0.000 description 19
- 239000013256 coordination polymer Substances 0.000 description 18
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 13
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 11
- 235000005811 Viola adunca Nutrition 0.000 description 7
- 240000009038 Viola odorata Species 0.000 description 7
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- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 5
- 229910052814 silicon oxide Inorganic materials 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- IBEFSUTVZWZJEL-UHFFFAOYSA-N trimethylindium Chemical compound C[In](C)C IBEFSUTVZWZJEL-UHFFFAOYSA-N 0.000 description 4
- MHYQBXJRURFKIN-UHFFFAOYSA-N C1(C=CC=C1)[Mg] Chemical compound C1(C=CC=C1)[Mg] MHYQBXJRURFKIN-UHFFFAOYSA-N 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 3
- 238000002109 crystal growth method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- RHUYHJGZWVXEHW-UHFFFAOYSA-N 1,1-Dimethyhydrazine Chemical compound CN(C)N RHUYHJGZWVXEHW-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010574 gas phase reaction Methods 0.000 description 2
- 238000001459 lithography Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RGGPNXQUMRMPRA-UHFFFAOYSA-N triethylgallium Chemical compound CC[Ga](CC)CC RGGPNXQUMRMPRA-UHFFFAOYSA-N 0.000 description 2
- NIIPNAJXERMYOG-UHFFFAOYSA-N 1,1,2-trimethylhydrazine Chemical compound CNN(C)C NIIPNAJXERMYOG-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 101150050733 Gnas gene Proteins 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
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- H01S5/00—Semiconductor lasers
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- H01S5/323—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
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- H01S5/32341—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser emitting light at a wavelength less than 900 nm blue laser based on GaN or GaP
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Description
図1は、本発明の実施の形態1に係る窒化物半導体装置を示す断面図である。この窒化物半導体装置は例えば青紫色LDの積層構造である。ただし、青紫色LDなどの光半導体装置に限らず、例えばトランジスタなどの一般的な半導体装置の積層構造でもよい。GaN基板10(基板)の主面である(0001)面上に層厚1μmのp型GaN層12(p型窒化物半導体層)が形成されている。p型GaN層12の炭素濃度は1×1018cm−3以下である。
図9は、本発明の実施の形態2に係る窒化物半導体装置を示す断面図である。この窒化物半導体装置は例えば青紫色LDの積層構造である。ただし、青紫色LDなどの光半導体装置に限らず、例えばトランジスタなどの一般的な半導体装置の積層構造でもよい。
図11は、本発明の実施の形態3に係る窒化物半導体装置を示す斜視図である。この窒化物半導体装置はリッジ導波路型の青紫色LDである。ただし、これに限らず、青紫色LD全般や発光ダイオードにも同様に適用できる。
12 p型GaN層(p型窒化物半導体層)
34 p型Al0.07Ga0.93N層(第1のp型窒化物半導体層)
36 p型GaN層(第2のp型窒化物半導体層)
38 n型GaN基板(基板)
42 n型Al0.07Ga0.93Nクラッド層(n型クラッド層)
46 活性層
52 p型Al0.07Ga0.93Nクラッド層(p型クラッド層)
54 p型GaNコンタクト層(p型コンタクト層)
Claims (6)
- 基板上に、III族原料として有機金属化合物、V族原料としてアンモニアとヒドラジン誘導体、及びp型不純物原料としてMg原料ガスを用いてp型窒化物半導体層を形成する工程を備え、
前記p型窒化物半導体層を形成する際に、前記III族原料、前記V族原料及び前記p型不純物原料を含む原料ガスの流速を0.2m/secより大きくすることを特徴とする窒化物半導体装置の製造方法。 - 基板上に、III族原料として有機金属化合物、V族原料としてアンモニア、及びp型不純物原料を用いて第1のp型窒化物半導体層を形成する工程と、
前記第1のp型窒化物半導体層上に、III族原料として有機金属化合物、V族原料としてアンモニアとヒドラジン誘導体、及びp型不純物原料としてMg原料ガスを用いて第2のp型窒化物半導体層を形成する工程とを備え、
前記第2のp型窒化物半導体層を形成する際に、前記III族原料、前記V族原料及び前記p型不純物原料を含む原料ガスの流速を0.2m/secより大きくすることを特徴とする窒化物半導体装置の製造方法。 - 前記第1のp型窒化物半導体層としてAlGaN層を形成し、
前記第2のp型窒化物半導体層としてGaN層を形成することを特徴とする請求項2に記載の窒化物半導体装置の製造方法。 - 基板上にn型クラッド層を形成する工程と、
前記n型クラッド層上に活性層を形成する工程と、
前記活性層上に、III族原料として有機金属化合物、V族原料としてアンモニア、及びp型不純物原料を用いてp型クラッド層を形成する工程と、
前記p型クラッド層上に、III族原料として有機金属化合物、V族原料としてアンモニアとヒドラジン誘導体、及びp型不純物原料としてMg原料ガスを用いてp型コンタクト層を形成する工程とを備え、
前記p型コンタクト層を形成する際に、前記III族原料、前記V族原料及び前記p型不純物原料を含む原料ガスの流速を0.2m/secより大きくすることを特徴とする窒化物半導体装置の製造方法。 - 前記p型クラッド層としてAlGaN層を形成し、
前記p型コンタクト層としてGaN層を形成することを特徴とする請求項4に記載の窒化物半導体装置の製造方法。 - 前記基板の近傍までは、前記V族原料を含む原料ガスと、前記p型不純物原料を含む原料ガスとを分けて導入することを特徴とする請求項1〜5の何れか1項に記載の窒化物半導体装置の製造方法。
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JP2009103092A JP5169972B2 (ja) | 2008-09-24 | 2009-04-21 | 窒化物半導体装置の製造方法 |
TW98121570A TWI473374B (zh) | 2008-09-24 | 2009-06-26 | 氮化物半導體裝置之製造方法 |
US12/501,511 US7825012B2 (en) | 2008-09-24 | 2009-07-13 | Method for manufacturing nitride semiconductor device |
CN200910204779.8A CN101684549B (zh) | 2008-09-24 | 2009-09-24 | 氮化物半导体装置的制造方法 |
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JP5218117B2 (ja) * | 2008-03-18 | 2013-06-26 | 三菱電機株式会社 | 窒化物半導体積層構造及び光半導体装置並びにその製造方法 |
JP2011151074A (ja) * | 2010-01-19 | 2011-08-04 | Mitsubishi Electric Corp | 窒化物半導体装置の製造方法 |
JP5252042B2 (ja) | 2011-07-21 | 2013-07-31 | 住友電気工業株式会社 | Iii族窒化物半導体発光素子、及びiii族窒化物半導体発光素子を作製する方法 |
JP5699983B2 (ja) * | 2012-04-27 | 2015-04-15 | 住友電気工業株式会社 | 窒化ガリウム系半導体を作製する方法、iii族窒化物半導体デバイスを作製する方法、及びiii族窒化物半導体デバイス |
TWI535055B (zh) | 2012-11-19 | 2016-05-21 | 新世紀光電股份有限公司 | 氮化物半導體結構及半導體發光元件 |
US10153394B2 (en) | 2012-11-19 | 2018-12-11 | Genesis Photonics Inc. | Semiconductor structure |
TWI524551B (zh) | 2012-11-19 | 2016-03-01 | 新世紀光電股份有限公司 | 氮化物半導體結構及半導體發光元件 |
TWI663745B (zh) * | 2012-11-19 | 2019-06-21 | 新世紀光電股份有限公司 | 氮化物半導體結構 |
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