JP7247902B2 - エピタキシャルウェーハの製造方法 - Google Patents
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/24—Deposition of silicon only
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- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
- C30B25/02—Epitaxial-layer growth
- C30B25/18—Epitaxial-layer growth characterised by the substrate
- C30B25/186—Epitaxial-layer growth characterised by the substrate being specially pre-treated by, e.g. chemical or physical means
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Description
以下のような導電型、直径、結晶面方位である単結晶シリコンウェーハを準備した。
基板の導電型 :p型
直径 :300mm
結晶面方位 :(100)
酸素原子層の形成において、大気中に放置した時間を7時間としたこと以外は実施例1と同じ条件でエピタキシャルウェーハの製造及び評価を行った。
実施例1及び比較例1と同じ単結晶シリコンウェーハを準備し、HF洗浄によるウェットプロセスでの自然酸化膜の除去を行った後、大気中に5時間放置して酸素原子層の形成を行った。次に、580℃の温度で単結晶シリコンウェーハ表面へのエピタキシャル成長を行った。
2…酸素原子層、
3…単結晶シリコン層、
10、10’…エピタキシャルウェーハ。
Claims (9)
- シリコンを含むIV族の元素からなるウェーハ上に単結晶シリコン層を形成するエピタキシャルウェーハの製造方法であって、
水素を含む雰囲気で前記シリコンを含むIV族の元素からなるウェーハ表面の自然酸化膜を除去する工程、
前記自然酸化膜を除去した後に前記ウェーハを酸化して酸素原子層を形成する工程、及び、
前記酸素原子層を形成した後に前記ウェーハ表面に気相成長法により単結晶シリコンをエピタキシャル成長させる工程を含み、
前記酸素原子層の酸素の平面濃度を4×1014atoms/cm2以下とすることを特徴とするエピタキシャルウェーハの製造方法。 - 前記シリコンを含むIV族の元素からなるウェーハとして、単結晶シリコンウェーハを用いることを特徴とする請求項1に記載のエピタキシャルウェーハの製造方法。
- 前記自然酸化膜を除去する工程では、前記ウェーハを水素を含む雰囲気で加熱することにより自然酸化膜を除去することを特徴とする請求項1又は請求項2に記載のエピタキシャルウェーハの製造方法。
- 前記自然酸化膜を除去する工程では、前記ウェーハを800℃以上1250℃以下の温度に加熱し、この範囲の温度を1秒以上5分以下の間保持することにより自然酸化膜を除去することを特徴とする請求項3に記載のエピタキシャルウェーハの製造方法。
- 前記自然酸化膜を除去する工程では、水素を含むプラズマを用いることにより自然酸化膜を除去することを特徴とする請求項1又は請求項2に記載のエピタキシャルウェーハの製造方法。
- 前記酸素原子層を形成する工程では、酸素を含む雰囲気で前記ウェーハを酸化することを特徴とする請求項1から請求項5のいずれか一項に記載のエピタキシャルウェーハの製造方法。
- 前記酸素原子層を形成する工程では、大気中で前記ウェーハを酸化することを特徴とする請求項1から請求項6のいずれか一項に記載のエピタキシャルウェーハの製造方法。
- 前記単結晶シリコンをエピタキシャル成長させる工程では、450℃以上800℃以下の温度でエピタキシャル成長を行うことを特徴とする請求項1から請求項7のいずれか一項に記載のエピタキシャルウェーハの製造方法。
- 前記ウェーハを酸化して酸素原子層を形成する工程と前記単結晶シリコンをエピタキシャル成長させる工程とを交互に複数回行うことを特徴とする請求項1から請求項8のいずれか一項に記載のエピタキシャルウェーハの製造方法。
Priority Applications (7)
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JP2020002741A JP7247902B2 (ja) | 2020-01-10 | 2020-01-10 | エピタキシャルウェーハの製造方法 |
US17/788,373 US20230028127A1 (en) | 2020-01-10 | 2020-11-24 | Method for manufacturing epitaxial wafer and epitaxial wafer |
EP20911506.2A EP4089720A4 (en) | 2020-01-10 | 2020-11-24 | METHOD FOR PRODUCING AN EPITACTIC WAFER AND EPITACTIC WAFER |
PCT/JP2020/043540 WO2021140763A1 (ja) | 2020-01-10 | 2020-11-24 | エピタキシャルウェーハの製造方法及びエピタキシャルウェーハ |
KR1020227022164A KR20220124696A (ko) | 2020-01-10 | 2020-11-24 | 에피택셜 웨이퍼의 제조방법 및 에피택셜 웨이퍼 |
CN202080092094.3A CN114930500A (zh) | 2020-01-10 | 2020-11-24 | 外延片的制造方法及外延片 |
TW109143646A TW202130845A (zh) | 2020-01-10 | 2020-12-10 | 磊晶晶圓之製造方法及磊晶晶圓 |
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US (1) | US20230028127A1 (ja) |
EP (1) | EP4089720A4 (ja) |
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CN116685723A (zh) * | 2021-01-25 | 2023-09-01 | 信越半导体株式会社 | 外延晶圆的制造方法 |
JP2024007890A (ja) * | 2022-07-06 | 2024-01-19 | 信越半導体株式会社 | エピタキシャルウェーハの製造方法 |
WO2024034433A1 (ja) | 2022-08-08 | 2024-02-15 | 信越半導体株式会社 | 量子コンピュータ用シリコン基板の製造方法、量子コンピュータ用シリコン基板及び半導体装置 |
JP2024168899A (ja) * | 2023-05-25 | 2024-12-05 | 信越半導体株式会社 | δドープ層を有する高移動度基板及び高移動度基板の製造方法 |
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JP2000323689A (ja) | 1999-05-14 | 2000-11-24 | Toshiba Corp | 半導体エピタキシャル基板及びその製造方法 |
JP2005109521A (ja) | 2004-12-20 | 2005-04-21 | Sumitomo Mitsubishi Silicon Corp | 表面処理方法およびシリコンウェーハ |
JP2019004050A (ja) | 2017-06-15 | 2019-01-10 | 信越半導体株式会社 | エピタキシャルウェーハの製造方法 |
JP2019117890A (ja) | 2017-12-27 | 2019-07-18 | 株式会社Sumco | エピタキシャルウェーハの製造方法およびエピタキシャルウェーハ |
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JP2021111696A (ja) | 2021-08-02 |
TW202130845A (zh) | 2021-08-16 |
EP4089720A4 (en) | 2024-01-17 |
CN114930500A (zh) | 2022-08-19 |
EP4089720A1 (en) | 2022-11-16 |
US20230028127A1 (en) | 2023-01-26 |
KR20220124696A (ko) | 2022-09-14 |
WO2021140763A1 (ja) | 2021-07-15 |
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