JP2012126613A - 炭化珪素単結晶の製造装置および製造方法 - Google Patents
炭化珪素単結晶の製造装置および製造方法 Download PDFInfo
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- 239000013078 crystal Substances 0.000 title claims abstract description 171
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 106
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 238000004519 manufacturing process Methods 0.000 title claims description 36
- 238000010926 purge Methods 0.000 claims abstract description 59
- 239000007789 gas Substances 0.000 claims description 103
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 65
- 239000003870 refractory metal Substances 0.000 claims description 10
- 238000005530 etching Methods 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 239000002019 doping agent Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002542 deteriorative effect Effects 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 229910002804 graphite Inorganic materials 0.000 description 14
- 239000010439 graphite Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 10
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 10
- 229910003468 tantalcarbide Inorganic materials 0.000 description 10
- 239000011810 insulating material Substances 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000012159 carrier gas Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 238000000859 sublimation Methods 0.000 description 2
- 230000008022 sublimation Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- C30B23/00—Single-crystal growth by condensing evaporated or sublimed materials
- C30B23/02—Epitaxial-layer growth
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Abstract
【解決手段】台座9をパージガスが種結晶5の裏面側から供給できる構造とし、種結晶5の外縁に向けてパージガスを流動させられるようにする。このような構造とすれば、パージガスの影響により、台座9のうちの種結晶5の周囲に位置する部分に多結晶が形成されることを抑制できる。これにより、SiC単結晶20を長尺成長させたとしても、多結晶のせり上がりによりSiC単結晶20の外縁部に多結晶が癒着することを防止することが可能となる。したがって、外縁部の品質が損なわれることなくSiC単結晶20を成長させることが可能となる。
【選択図】図1
Description
図1に、本実施形態のSiC単結晶製造装置1の断面斜視図を示す。以下、この図を参照してSiC単結晶製造装置1の構造について説明する。
本発明の第2実施形態について説明する。本実施形態は、第1実施形態に対して台座9の形状を変更したものであり、その他に関しては第1実施形態と同様であるため、第1実施形態と異なる部分についてのみ説明する。
本発明の第3実施形態について説明する。本実施形態も、第1実施形態に対して台座9の形状を変更したものであり、その他に関しては第1実施形態と同様であるため、第1実施形態と異なる部分についてのみ説明する。
本発明の第4実施形態について説明する。本実施形態も、第1実施形態に対して台座9の形状を変更したものであり、その他に関しては第1実施形態と同様であるため、第1実施形態と異なる部分についてのみ説明する。
上記各実施形態では、台座9を例えば黒鉛や表面をTaC(炭化タンタル)などの高融点金属炭化物にてコーティングした黒鉛などで構成する場合について説明したが、黒鉛が露出していると熱エッチングやエッチングガスなどによって露出表面が荒れてきて多結晶が生成され易くなる。このため、台座9を高融点金属炭化物がコーティングされた黒鉛にて構成するのが好ましい。特に、多結晶の生成を抑制したい保持部93における絞り部93bの下面については、高融点金属炭化物をコーティングすることが有効である。
3 原料ガス
5 種結晶
6 真空容器
8 加熱容器
8a ガス導入口
9 台座
91 連結部
92 固定部
93 保持部
94、95c パージガス導入経路
10 外周断熱材
11 回転引上ガス導入機構
12、13 第1、第2加熱装置
20 SiC単結晶
Claims (5)
- 台座(9)に対して炭化珪素単結晶基板にて構成された種結晶(5)を配置し、該種結晶(5)の下方から炭化珪素の原料ガス(3)を供給することにより、前記種結晶(5)の表面に炭化珪素単結晶(20)を成長させる炭化珪素単結晶の製造装置において、
前記台座(9)を支持すると共に、該台座(9)に対して前記種結晶(5)が配置された方と反対側となる裏面側からパージガスを供給するパージガス導入機構(11)を有し、
前記台座(9)には、前記種結晶(5)の外縁に向けてパージガスを排出するパージガス導入経路(94、95c)が備えられていることを特徴とする炭化珪素単結晶の製造装置。 - 前記台座(9)は、前記パージガス導入経路(94、95c)における前記パージガスの排出口が該台座(9)の中心軸に対して径方向外側に向けられることで、前記パージガスを前記種結晶(5)の外縁から径方向外側に向けて排出し、前記パージガスを該台座(9)の下面に沿って流動させることを特徴とする請求項1に記載の炭化珪素単結晶の製造装置。
- 前記パージガス導入機構(11)は、前記パージガスとして、不活性ガスとエッチングガスおよび炭化珪素に対する不純物ドーパントとなるガスのいずれか1つもしくは複数の組み合わせのガスを前記台座(9)に供給することを特徴とする請求項1または2に記載の炭化珪素単結晶の製造装置。
- 前記台座(9)の表面は、高融点金属炭化物によりコーティングされていることを特徴とする請求項1ないし3のいずれか1つに記載の炭化珪素単結晶の製造装置。
- 台座(9)に対して炭化珪素単結晶基板にて構成された種結晶(5)を配置し、該種結晶(5)の下方から炭化珪素の原料ガス(3)を供給することにより、前記種結晶(5)の表面に炭化珪素単結晶(20)を成長させる炭化珪素単結晶の製造方法において、
前記台座(9)に対して、パージガス導入機構(11)により、前記台座(9)のうち前記種結晶(5)が配置された方と反対側となる裏面側からパージガスを供給し、前記台座(9)から前記種結晶(5)の外縁に向けてパージガスを排出させつつ、前記炭化珪素単結晶(20)を成長させることを特徴とする炭化珪素単結晶の製造方法。
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JP2010280309A JP5287840B2 (ja) | 2010-12-16 | 2010-12-16 | 炭化珪素単結晶の製造装置 |
EP11192942.8A EP2465980B1 (en) | 2010-12-16 | 2011-12-12 | Apparatus and method for manufacturing silicon carbide single crystal |
KR1020110134710A KR101437378B1 (ko) | 2010-12-16 | 2011-12-14 | 탄화규소 단결정의 제조 장치 및 제조 방법 |
US13/325,233 US9328431B2 (en) | 2010-12-16 | 2011-12-14 | Apparatus for manufacturing a silicon carbide single crystal comprising a mounting portion and a purge gas introduction system |
CN201610862561.1A CN106948007A (zh) | 2010-12-16 | 2011-12-16 | 制造碳化硅单晶的装置和方法 |
CN2011104317479A CN102534795A (zh) | 2010-12-16 | 2011-12-16 | 制造碳化硅单晶的装置和方法 |
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JP2014224014A (ja) * | 2013-05-16 | 2014-12-04 | 株式会社デンソー | 炭化珪素単結晶の製造装置 |
JP7221363B1 (ja) | 2021-09-15 | 2023-02-13 | 國家中山科學研究院 | 炭化ケイ素単結晶の成長収率を向上する方法 |
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US9580837B2 (en) | 2014-09-03 | 2017-02-28 | Ii-Vi Incorporated | Method for silicon carbide crystal growth by reacting elemental silicon vapor with a porous carbon solid source material |
JP2022103720A (ja) * | 2020-12-28 | 2022-07-08 | 昭和電工株式会社 | 炭化珪素単結晶製造装置および炭化珪素単結晶の製造方法 |
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JP7221363B1 (ja) | 2021-09-15 | 2023-02-13 | 國家中山科學研究院 | 炭化ケイ素単結晶の成長収率を向上する方法 |
JP2023074614A (ja) * | 2021-09-15 | 2023-05-30 | 國家中山科學研究院 | 炭化ケイ素単結晶の成長収率を向上する方法 |
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KR20120067943A (ko) | 2012-06-26 |
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CN102534795A (zh) | 2012-07-04 |
CN106948007A (zh) | 2017-07-14 |
US9328431B2 (en) | 2016-05-03 |
EP2465980A3 (en) | 2013-11-27 |
KR101437378B1 (ko) | 2014-09-05 |
US20120152165A1 (en) | 2012-06-21 |
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