JP7094171B2 - SiC単結晶の製造方法 - Google Patents
SiC単結晶の製造方法 Download PDFInfo
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 42
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- 239000000463 material Substances 0.000 description 3
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
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- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
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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
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/32—Carbides
- C23C16/325—Silicon carbide
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- 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
- C23C16/44—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 method of coating
- C23C16/458—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 method of coating characterised by the method used for supporting substrates in the reaction chamber
- C23C16/4582—Rigid and flat substrates, e.g. plates or discs
- C23C16/4583—Rigid and flat substrates, e.g. plates or discs the substrate being supported substantially horizontally
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B23/00—Single-crystal growth by condensing evaporated or sublimed materials
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- C—CHEMISTRY; METALLURGY
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- C30B23/00—Single-crystal growth by condensing evaporated or sublimed materials
- C30B23/02—Epitaxial-layer growth
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
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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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- C30B35/00—Apparatus not otherwise provided for, specially adapted for the growth, production or after-treatment of single crystals or of a homogeneous polycrystalline material with defined structure
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Description
図1は、本発明の第一実施形態に係る台座を備えた、SiC単結晶の製造装置100の断面図である。SiC単結晶の製造装置100は、少なくとも、坩堝101と、坩堝101内の一端側に配された結晶成長用のシード(種結晶)102の台座(支持部材)103とを備え、坩堝101内の他の一端側に、原料104が収容されるように構成されている。SiC単結晶の製造装置100は、さらに、坩堝101の外壁を囲むコイル、台座103から原料104に向けて拡径するテーパーガイドを備えていてもよい。
本実施形態の台座103を用いたSiC単結晶の製造方法について説明する。
図3(a)は、本発明の第二実施形態に係る台座113を用いた場合において、図2(a)と同様に台座113の周辺の構成を模式的に示す断面図である。本実施形態の台座113は、局所的に薄いガス透過領域116を複数有する。その他の構成については、第一実施形態の構成と同様であり、第一実施形態と対応する箇所については、形状の違いによらず、同じ符号で示している。本実施形態では、少なくとも第一実施形態と同様の効果を得ることができる。
図4(a)、(b)は、本発明の第三実施形態に係る台座123を用いた場合において、図2(a)と同様に台座123の周辺の構成を模式的に示す断面図である。本実施形態の台座123は、ガス透過領域の厚さ106Tが、厚さ方向の平面視における中心Cから遠ざかるにつれて増加している。厚さ106Tの増加のしかたは、連続であってもよいし、不連続であってもよい。この場合、相対的に薄い中央部付近において、より多くのガスが透過するようになる。
図5(a)は、本発明の第三実施形態に係る台座133を用いた場合において、図2(a)と同様に台座133の周辺の構成を模式的に示す断面図である。本実施形態の台座133は、ガス透過領域106と空隙107の形状が、第一実施形態の台座103と異なる。本実施形態では、台座133の一方の主面133aの一部において、深さ方向Dにガス透過領域136を有し、ガス透過領域136より内側に、外部に連通する空隙137を有する。その他の構成については、第一実施形態の構成と同様であり、第一実施形態と対応する箇所については、形状の違いによらず、同じ符号で示している。
101・・・坩堝
102・・・シード
103、113、123、133・・・台座
103a・・・台座の一方の主面
104・・・原料
105・・・接着剤層
106、136・・・ガス透過領域
106T、136T・・・ガス透過領域の厚さ
107・・・空隙
D・・・深さ方向
G、G1、G2・・・ガス
R・・・領域
Claims (7)
- 台座を用いて、SiC単結晶を製造するSiC単結晶の製造方法であって、
前記台座の一方の主面に接着剤を用いてシードを貼り付けた後に、前記接着剤を硬化させるための加熱工程において、前記シードに対し、前記台座側に向かって押圧し、
前記加熱工程の後に、前記台座に形成されている凹部を埋め込む工程を有し、
前記台座は、結晶成長用のシードの台座であって、
前記シードを接着する一方の主面が平坦であり、
前記一方の主面からの厚さが、局所的に薄く形成されたガス透過領域を有することを特徴とするSiC単結晶の製造方法。 - 前記ガス透過領域の厚さが、1mm以上5mm未満であることを特徴とする請求項1に記載のSiC単結晶の製造方法。
- 前記ガス透過領域の厚さが、前記台座の中心から遠ざかるにつれて増加していることを特徴とする請求項1または2のいずれかに記載のSiC単結晶の製造方法。
- 前記ガス透過領域以外の領域が、厚さ10mm以上の部分を含むことを特徴とする請求項1~3のいずれか一項に記載のSiC単結晶の製造方法。
- 厚さ方向からの平面視において、前記シードの中心から外周までの距離をrとしたときに、前記ガス透過領域が、前記シードの中心から(r/2)の距離の範囲に含まれていることを特徴とする請求項1~4のいずれか一項に記載のSiC単結晶の製造方法。
- 前記台座は、前記シードを接着する一方の主面が平坦であり、
前記一方の主面の一部において深さ方向にガス透過領域を有し、前記ガス透過領域より内側に、外部に連通する空隙を有することを特徴とする請求項1~5のいずれか一項に記載のSiC単結晶の製造方法。 - 前記空隙が、前記一方の主面から1mm以上5mm以下の距離に形成されていることを特徴とする請求項6に記載のSiC単結晶の製造方法。
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JP2018135092A JP7094171B2 (ja) | 2018-07-18 | 2018-07-18 | SiC単結晶の製造方法 |
CN201910627951.4A CN110735183A (zh) | 2018-07-18 | 2019-07-12 | 基座、SiC单晶的制造装置和制造方法 |
US16/512,669 US11519096B2 (en) | 2018-07-18 | 2019-07-16 | Pedestal for supporting a seed for SiC single crystal growth which includes a gas-permeable region of reduced thickness |
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