JP5274245B2 - 化合物半導体構造とその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 34
- 150000001875 compounds Chemical class 0.000 title claims description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000758 substrate Substances 0.000 claims description 98
- 229910002704 AlGaN Inorganic materials 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000031700 light absorption Effects 0.000 claims description 6
- 238000000862 absorption spectrum Methods 0.000 claims description 5
- 239000003086 colorant Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 59
- 239000007789 gas Substances 0.000 description 21
- 239000013078 crystal Substances 0.000 description 13
- 238000000927 vapour-phase epitaxy Methods 0.000 description 11
- 150000004678 hydrides Chemical class 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 6
- 235000012431 wafers Nutrition 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 4
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 238000002109 crystal growth method Methods 0.000 description 3
- 238000001784 detoxification Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005533 two-dimensional electron gas Effects 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000002248 hydride vapour-phase epitaxy Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- QBJCZLXULXFYCK-UHFFFAOYSA-N magnesium;cyclopenta-1,3-diene Chemical compound [Mg+2].C1C=CC=[C-]1.C1C=CC=[C-]1 QBJCZLXULXFYCK-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/778—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface
- H01L29/7786—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface with direct single heterostructure, i.e. with wide bandgap layer formed on top of active layer, e.g. direct single heterostructure MIS-like HEMT
- H01L29/7787—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface with direct single heterostructure, i.e. with wide bandgap layer formed on top of active layer, e.g. direct single heterostructure MIS-like HEMT with wide bandgap charge-carrier supplying layer, e.g. direct single heterostructure MODFET
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Description
導電性SiC基板であって、基板の主たる色が黒色、導電型がp型、抵抗率が1×103Ωcm以上、1×105Ωcm未満であるか、基板の主たる色が青色、導電型がp型、抵抗率が10Ωcm以上、1×105Ωcm未満である、導電性SiC基板と、
前記導電性SiC基板上に形成され、厚さ10μm以上の半絶縁性AlN層と、
を有する化合物半導体構造、または
導電性SiC基板であって、基板の主たる色が緑色、導電型がn型、抵抗率が0.08Ωcm以上、1×105Ωcm未満である導電性SiC基板と、
前記導電性SiC基板上に形成され、厚さ10μm以上のAlN層と、
を有し、前記SiC基板の光吸収スペクトルのピーク値の吸収係数が、波長0.5μmの吸収係数の2倍以内である化合物半導体構造
が提供される。
(a)導電性SiC基板の色と抵抗率を検出する工程と、
(b)前記工程(a)で検出した色と抵抗率が、予め設定した複数のカテゴリのいずれかに属するか否かを決定する工程と、
(c)前記工程(a)で検出した色と抵抗が、予め設定したカテゴリのいずれかに属すると前記工程(b)で決定した場合、前記導電性SiC基板上に半絶縁性AlN層を厚さ10μm以上エピタキシャルに成長する工程と、
を含む化合物半導体構造の製造方法
が提供される。
圧力: 常圧
ガス流量:
HCl:100ccm、
NH3:10LM(リットルパーミニッツ)
温度: 1100℃
である。AlN層の抵抗率は、たとえば1E5(1×105)Ωcmより格段に高くすることができる。
原料とその流量:
トリメチルガリウム(TMG): 50sccm、
トリメチルアルミニウム(TMA): (必要に応じて)5sccm、
アンモニア(NH3): 20SLM、
n型不純物: シラン(SiH4)
p型不純物: ビスシクロペンタディエニルマグネシウム(Cp2Mg)
圧力: 100torr、
温度: 1100℃。
Claims (8)
- 導電性SiC基板であって、基板の主たる色が黒色、導電型がp型、抵抗率が1×103Ωcm以上、1×105Ωcm未満であるか、基板の主たる色が青色、導電型がp型、抵抗率が10Ωcm以上、1×105Ωcm未満である、導電性SiC基板と、
前記導電性SiC基板上に形成され、厚さ10μm以上の半絶縁性AlN層と、
を有する化合物半導体構造。 - 導電性SiC基板であって、基板の主たる色が緑色、導電型がn型、抵抗率が0.1Ωcm以上、1×105Ωcm未満である導電性SiC基板と、
前記導電性SiC基板上に形成され、厚さ10μm以上のAlN層と、
を有し、前記SiC基板の光吸収スペクトルのピーク値の吸収係数が、波長0.5μmの吸収係数の2倍以内である化合物半導体構造。 - 前記AlN層が、Clを含む請求項1または2記載の化合物半導体構造。
- 前記AlN層の上に積層された、i型GaN層、i型AlGaN層、n型AlGaN層と、
前記n型AlGaN層の上にオーミックコンタクトする1対のソース/ドレイン電極と、
前記1対のソース/ドレイン電極の間の、前記n型AlGaN層の上に形成されたn型GaN層と、
前記n型GaN層上に堆積されたSiN膜と、
前記1対のソース/ドレイン電極の間で前記SiN膜に形成された開口と、
前記開口を通じて前記n型GaN層上にショットキコンタクトするゲート電極と、
をさらに有する請求項1〜3のいずれか1項記載の化合物半導体構造。 - (a)導電性SiC基板の色と抵抗率を検出する工程と、
(b)前記工程(a)で検出した色と抵抗率が、予め設定したカテゴリ、(1)基板の主たる色が緑色、導電型がn型、抵抗率が0.1Ωcm以上、1×10 5 Ωcm未満であるか、(2)基板の主たる色が黒色、導電型がp型、抵抗率が1×10 3 Ωcm以上、1×10 5 Ωcm未満であるか、(3)基板の主たる色が青色、導電型がp型、抵抗率が10Ωcm以上、1×10 5 Ωcm未満であるか、のいずれかに属するか否かを決定する工程と、
(c)前記工程(a)で検出した色と抵抗が、予め設定したカテゴリのいずれかに属すると前記工程(b)で決定した場合、前記導電性SiC基板上に半絶縁性AlN層を厚さ10μm以上エピタキシャルに成長する工程と、
を含む化合物半導体構造の製造方法。 - (d)前記工程(c)で形成したAlN層の上にデバイス層を成長する工程
をさらに含む請求項5記載の化合物半導体構造の製造方法。 - 前記工程(d)が、前記工程(c)の後、前記AlN層の上に、MOCVDにより、i型GaN層、i型AlGaN層、n型AlGaN層を積層する工程を含む請求項6記載の化合物半導体構造の製造方法。
- 前記工程(d)における基板加熱温度を、前記色と抵抗率に依存して調整する請求項7記載の化合物半導体構造の製造方法。
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JP4712683B2 (ja) * | 2006-12-21 | 2011-06-29 | パナソニック株式会社 | トランジスタおよびその製造方法 |
JP2011040676A (ja) * | 2009-08-18 | 2011-02-24 | Sanken Electric Co Ltd | 半導体装置及びその製造方法 |
JP2011187623A (ja) * | 2010-03-08 | 2011-09-22 | Furukawa Electric Co Ltd:The | 半導体素子、および半導体素子の製造方法 |
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US7033912B2 (en) * | 2004-01-22 | 2006-04-25 | Cree, Inc. | Silicon carbide on diamond substrates and related devices and methods |
JP2006032911A (ja) * | 2004-06-15 | 2006-02-02 | Ngk Insulators Ltd | 半導体積層構造、半導体素子およびhemt素子 |
JP2006245317A (ja) * | 2005-03-03 | 2006-09-14 | Fujitsu Ltd | 半導体装置およびその製造方法 |
US7592211B2 (en) * | 2006-01-17 | 2009-09-22 | Cree, Inc. | Methods of fabricating transistors including supported gate electrodes |
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JP2002359256A (ja) * | 2001-05-31 | 2002-12-13 | Fujitsu Ltd | 電界効果型化合物半導体装置 |
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US20090065787A1 (en) | 2009-03-12 |
US8030164B2 (en) | 2011-10-04 |
US20110297957A1 (en) | 2011-12-08 |
WO2007116517A1 (ja) | 2007-10-18 |
JPWO2007116517A1 (ja) | 2009-08-20 |
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