JP5665745B2 - 電子デバイス用エピタキシャル基板およびその製造方法 - Google Patents
電子デバイス用エピタキシャル基板およびその製造方法 Download PDFInfo
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- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 4
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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
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/185—Joining of semiconductor bodies for junction formation
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/66409—Unipolar field-effect transistors
- H01L29/66446—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET]
- H01L29/66462—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET] with a heterojunction interface channel or gate, e.g. HFET, HIGFET, SISFET, HJFET, HEMT
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66848—Unipolar field-effect transistors with a Schottky gate, i.e. MESFET
- H01L29/66856—Unipolar field-effect transistors with a Schottky gate, i.e. MESFET with an active layer made of a group 13/15 material
- H01L29/66863—Lateral single gate transistors
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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
- H01L29/80—Field effect transistors with field effect produced by a PN or other rectifying junction gate, i.e. potential-jump barrier
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Description
(1)低抵抗Si単結晶基板と高抵抗Si単結晶基板とを貼り合わせて貼り合わせ基板を形成する工程と、該貼り合わせ基板の高抵抗Si単結晶基板側の表面上に、絶縁層としてのバッファを形成する工程と、該バッファ上に、複数層のIII族窒化物層をエピタキシャル成長させて主積層体を形成してエピタキシャル基板を作製する工程とを具え、前記低抵抗Si単結晶基板の比抵抗が100Ω・cm以下であり、かつ前記高抵抗Si単結晶基板の比抵抗が1000Ω・cm以上であることを特徴とする横方向を電流導通方向とする電子デバイス用エピタキシャル基板の製造方法。
(111)面4インチ高抵抗Si単結晶基板(厚さ:40μm,FZ法,意図的なドープ無し,比抵抗:6×103Ω・cm)と(111)面4インチ低抵抗Si単結晶基板(厚さ:560μm,CZ法,Bドープ,比抵抗:15Ω・cm)とを張り合わせて、貼り合わせ基板を用意した。この高抵抗Si単結晶基板は、予め熱酸化することにより基板の両面にSi酸化膜を形成後、片面のSi酸化膜を除去することにより形成した、一方の面にSi酸化膜(厚さ:1μm)を有し、上記貼り合わせは、このSi酸化膜を介して行った。
(111)面4インチSi単結晶基板(厚さ:600μm,CZ法,Bドープ,比抵抗:6×103Ω・cm,SORI:3.1μm、LTVの最大値:0.9μm)上に、実施例1と同様の構造を同条件にて形成し、試料を得た。このようにして形成されたエピタキシャル基板の断面から見た反り形状を図6(a)に示す。図6(a)は、オリエンテーションフラット中心部と基板中心部とを通る基板断面の表面形状を表している。このエピタキシャル基板のSORIおよびLTVを測定したところ、SORIは21.8μm、LTVの最大値は3.0μmであった。
比較例1と同様のSi単結晶基板(SORI:3.0μm、LTVの最大値:0.9μm)上に、実施例2と同様の構造を同条件にて形成し、試料を得た。このようにして形成されたエピタキシャル基板の断面から見た反り形状を図6(b)に示す。図6(b)は、オリエンテーションフラット中心部と基板中心部とを通る基板断面の表面形状を表している。このエピタキシャル基板のSORIおよびLTVを測定したところ、SORIは36.9μm、LTVの最大値は3.5μmであった。
2 基板
2a 低抵抗Si単結晶基板
2b 高抵抗Si単結晶基板
3 バッファ
4 主積層体
4a チャネル層
4b 電子供給層
5 超格子積層体
5a 第1層
5b 第2層
6 初期成長層
21 絶縁性基板
22 チャネル層
23 電子供給層
24 ソース電極
25 ドレイン電極
26 ゲート電極
Claims (9)
- 低抵抗Si単結晶基板と高抵抗Si単結晶基板とを貼り合わせて貼り合わせ基板を形成する工程と、該貼り合わせ基板の高抵抗Si単結晶基板側の表面上に、絶縁層としてのバッファを形成する工程と、該バッファ上に、複数層のIII族窒化物層をエピタキシャル成長させて主積層体を形成してエピタキシャル基板を作製する工程とを具え、前記低抵抗Si単結晶基板の比抵抗が100Ω・cm以下であり、かつ前記高抵抗Si単結晶基板の比抵抗が1000Ω・cm以上であることを特徴とする横方向を電流導通方向とする電子デバイス用エピタキシャル基板の製造方法。
- 前記貼り合わせ基板を形成する工程は、前記低抵抗Si単結晶基板と前記高抵抗Si単結晶基板との貼り合わせを、Si酸化膜を介して行う請求項1に記載の電子デバイス用エピタキシャル基板の製造方法。
- 低抵抗Si単結晶基板上に、高抵抗Si単結晶層をエピタキシャル成長させる工程と、前記高抵抗Si単結晶層上に、絶縁層としてのバッファを形成する工程と、該バッファ上に、複数層のIII族窒化物層をエピタキシャル成長させて主積層体を形成してエピタキシャル基板を作製する工程とを具え、前記低抵抗Si単結晶基板の比抵抗が100Ω・cm以下であり、かつ前記高抵抗Si単結晶層の比抵抗が1000Ω・cm以上であることを特徴とする横方向を電流導通方向とする電子デバイス用エピタキシャル基板の製造方法。
- 低抵抗Si単結晶基板および該低抵抗Si単結晶基板の上方に配設された高抵抗Si単結晶基板を有する基板と、前記高抵抗Si単結晶基板上に配設された絶縁層としてのバッファと、該バッファ上に、複数層のIII族窒化物層をエピタキシャル成長させた主積層体とを具え、前記低抵抗Si単結晶基板の比抵抗が100Ω・cm以下であり、かつ前記高抵抗Si単結晶基板の比抵抗が1000Ω・cm以上であることを特徴とする横方向を電流導通方向とする電子デバイス用エピタキシャル基板。
- 前記低抵抗Si単結晶基板および前記高抵抗Si単結晶基板の間にSi酸化膜を設ける請求項4に記載の電子デバイス用エピタキシャル基板。
- 前記高抵抗Si単結晶基板の厚さは、10μm以上である請求項4または5に記載の電子デバイス用エピタキシャル基板。
- 前記低抵抗Si単結晶基板の厚さは、前記高抵抗Si単結晶基板の厚さの10倍以上である請求項4、5または6に記載の電子デバイス用エピタキシャル基板。
- 前記バッファは、超格子構造または傾斜組成構造を有する請求項4〜7のいずれか一項に記載の電子デバイス用エピタキシャル基板。
- 前記バッファは、C濃度が1×1018atoms/cm3以上である請求項4〜8のいずれか一項に記載の電子デバイス用エピタキシャル基板。
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JP5636183B2 (ja) * | 2009-11-11 | 2014-12-03 | コバレントマテリアル株式会社 | 化合物半導体基板 |
US9087812B2 (en) * | 2011-07-15 | 2015-07-21 | International Rectifier Corporation | Composite semiconductor device with integrated diode |
WO2014041736A1 (ja) * | 2012-09-13 | 2014-03-20 | パナソニック株式会社 | 窒化物半導体構造物 |
JP6220573B2 (ja) * | 2013-06-18 | 2017-10-25 | シャープ株式会社 | 窒化物半導体装置、エピタキシャルウェハの製造方法および電界効果トランジスタ |
CN107771352B (zh) * | 2015-06-26 | 2022-05-10 | 英特尔公司 | 设计的硅衬底上的gan器件 |
JP6653750B2 (ja) * | 2016-02-26 | 2020-02-26 | サンケン電気株式会社 | 半導体基体及び半導体装置 |
JP6290321B2 (ja) * | 2016-07-22 | 2018-03-07 | 住友化学株式会社 | 窒化物半導体エピタキシャル基板の製造方法、及び窒化物半導体デバイスの製造方法 |
DE102016223622A1 (de) * | 2016-11-29 | 2018-05-30 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Halbleiterbauelement und Verfahren zu dessen Herstellung |
JP7279552B2 (ja) | 2019-07-11 | 2023-05-23 | 信越半導体株式会社 | 電子デバイス用基板およびその製造方法 |
JP6863423B2 (ja) * | 2019-08-06 | 2021-04-21 | 信越半導体株式会社 | 電子デバイス用基板およびその製造方法 |
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JP2001196308A (ja) * | 2000-01-11 | 2001-07-19 | Tokin Corp | シリコンウエハーおよびその製造方法およびそれを用いた半導体素子 |
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US6008110A (en) * | 1994-07-21 | 1999-12-28 | Kabushiki Kaisha Toshiba | Semiconductor substrate and method of manufacturing same |
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2010
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JP2001196308A (ja) * | 2000-01-11 | 2001-07-19 | Tokin Corp | シリコンウエハーおよびその製造方法およびそれを用いた半導体素子 |
JP2002299254A (ja) * | 2001-03-30 | 2002-10-11 | Toyota Central Res & Dev Lab Inc | 半導体基板の製造方法及び半導体素子 |
JP2008262973A (ja) * | 2007-04-10 | 2008-10-30 | Toyota Motor Corp | 半導体ウエハとその製造方法 |
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WO2011016219A1 (ja) | 2011-02-10 |
US20120153440A1 (en) | 2012-06-21 |
US8946863B2 (en) | 2015-02-03 |
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