JP2015120620A - Ga2O3系結晶膜の成膜方法、及び結晶積層構造体 - Google Patents
Ga2O3系結晶膜の成膜方法、及び結晶積層構造体 Download PDFInfo
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- 239000013078 crystal Substances 0.000 title claims abstract description 221
- 238000000151 deposition Methods 0.000 title abstract 5
- 239000000758 substrate Substances 0.000 claims abstract description 69
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 claims description 232
- 238000000034 method Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000011156 evaluation Methods 0.000 description 13
- 238000001228 spectrum Methods 0.000 description 13
- 239000004065 semiconductor Substances 0.000 description 11
- 230000004888 barrier function Effects 0.000 description 10
- 230000005684 electric field Effects 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 238000001451 molecular beam epitaxy Methods 0.000 description 3
- 230000005533 two-dimensional electron gas Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000000089 atomic force micrograph Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
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Abstract
Description
(結晶積層構造体の構成)
図1は、第1の実施の形態に係る結晶積層構造体の垂直断面図である。結晶積層構造体1は、Ga2O3系基板10と、Ga2O3系基板10上にエピタキシャル結晶成長により形成されたGa2O3系結晶膜12を有する。
以下に、Ga2O3系結晶膜の主面の平坦性、成長速度、結晶品質についての評価結果を示す。なお、本評価においては、Ga2O3系基板としてGa2O3基板を用いて、Ga2O3系結晶膜として厚さおよそ100〜300nmのGa2O3結晶膜をMBE法により形成した。また、Ga2O3結晶膜の酸素源にはオゾンを用いた。
第2の実施の形態として、第1の実施の形態に係るGa2O3系基板10及びGa2O3系結晶膜12を含む半導体装置の1つである高電子移動度トランジスタ(High Electron Mobility Transistor:HEMT)について説明する。
第3の実施の形態として、第1の実施の形態に係るGa2O3系基板10及びGa2O3系結晶膜12を含む半導体装置の1つであるMESFET(Metal-Semiconductor Field Effect Transistor)について説明する。
第4の実施の形態として、第1の実施の形態に係るGa2O3系基板10及びGa2O3系結晶膜12を含む半導体装置の1つであるショットキーバリアダイオードについて説明する。
第5の実施の形態として、第1の実施の形態に係るGa2O3系基板10及びGa2O3系結晶膜12を含む半導体装置の1つであるMOSFET(Metal-oxide-Semiconductor Field Effect Transistor)について説明する。
上記実施の形態によれば、量産に十分な成長速度で、結晶品質や主面の平坦性に優れるGa2O3系結晶膜を成膜することができる。また、Ga2O3系結晶膜が結晶品質及び主面の平坦性に優れるため、Ga2O3系結晶膜上に品質のよい結晶膜を成長させることができる。このため、本実施の形態に係るGa2O3系結晶膜を含む結晶積層構造体を高品質な半導体装置の製造に用いることができる。
Claims (5)
- Ga2O3系基板の面方位が(001)である主面上に、750℃以上の成長温度でGa2O3系結晶膜をエピタキシャル成長させる、
Ga2O3系結晶膜の成膜方法。 - 前記Ga2O3系結晶膜の主面が、RMS値が1nm以下の平坦性を有する、
請求項1に記載のGa2O3系結晶膜の成膜方法。 - 前記Ga2O3系結晶膜はGa2O3結晶膜である、
請求項1又は2に記載のGa2O3系結晶膜の成膜方法。 - 主面の面方位が(001)であるGa2O3系基板と、
前記Ga2O3系基板の前記主面上にエピタキシャル結晶成長により形成され、その主面が、RMS値が1nm以下の平坦性を有するGa2O3系結晶膜と、
を含む結晶積層構造体。 - 前記Ga2O3系結晶膜はGa2O3結晶膜である、
請求項4に記載の結晶積層構造体。
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JP2013265771A JP5892495B2 (ja) | 2013-12-24 | 2013-12-24 | Ga2O3系結晶膜の成膜方法、及び結晶積層構造体 |
US14/581,893 US9245749B2 (en) | 2013-12-24 | 2014-12-23 | Method of forming Ga2O3-based crystal film and crystal multilayer structure |
CN201410810880.9A CN104726935B (zh) | 2013-12-24 | 2014-12-23 | Ga2O3系晶体膜的成膜方法和晶体层叠结构体 |
EP14200002.5A EP2889398B1 (en) | 2013-12-24 | 2014-12-23 | Crystal multilayer structure and semiconductor device comprising ga2o3 crystal film |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017041593A (ja) * | 2015-08-21 | 2017-02-23 | 株式会社タムラ製作所 | Ga2O3系結晶膜の形成方法 |
JP2019046984A (ja) * | 2017-09-04 | 2019-03-22 | 株式会社Flosfia | 半導体装置の製造方法および半導体装置 |
JP2020021829A (ja) * | 2018-08-01 | 2020-02-06 | 国立研究開発法人物質・材料研究機構 | 半導体装置および半導体装置の製造方法 |
JP2020021828A (ja) * | 2018-08-01 | 2020-02-06 | 国立研究開発法人物質・材料研究機構 | 半導体装置および半導体装置の製造方法 |
WO2023149180A1 (ja) * | 2022-02-02 | 2023-08-10 | 信越化学工業株式会社 | 結晶性酸化物膜、積層構造体、半導体装置、及び結晶性酸化物膜の製造方法 |
JP7461325B2 (ja) | 2021-09-13 | 2024-04-03 | 株式会社豊田中央研究所 | 酸化ガリウム系半導体基板の表面処理方法および半導体装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP5984069B2 (ja) | 2013-09-30 | 2016-09-06 | 株式会社タムラ製作所 | β−Ga2O3系単結晶膜の成長方法、及び結晶積層構造体 |
JP6744523B2 (ja) * | 2015-12-16 | 2020-08-19 | 株式会社タムラ製作所 | 半導体基板、並びにエピタキシャルウエハ及びその製造方法 |
US20170179987A1 (en) * | 2015-12-18 | 2017-06-22 | Intel Corporation | Embedded port in wearable mobile electronic device |
WO2018045175A1 (en) * | 2016-09-01 | 2018-03-08 | Hrl Laboratories, Llc | Normally-off gallium oxide based vertical transistors with p-type algan blocking layers |
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