JP7440666B2 - 気相成長装置及び気相成長方法 - Google Patents
気相成長装置及び気相成長方法 Download PDFInfo
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- JP7440666B2 JP7440666B2 JP2022569820A JP2022569820A JP7440666B2 JP 7440666 B2 JP7440666 B2 JP 7440666B2 JP 2022569820 A JP2022569820 A JP 2022569820A JP 2022569820 A JP2022569820 A JP 2022569820A JP 7440666 B2 JP7440666 B2 JP 7440666B2
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- 238000001947 vapour-phase growth Methods 0.000 title claims description 131
- 238000000034 method Methods 0.000 title claims description 66
- 239000007789 gas Substances 0.000 claims description 1112
- 238000010926 purge Methods 0.000 claims description 489
- 238000006243 chemical reaction Methods 0.000 claims description 162
- 238000005192 partition Methods 0.000 claims description 144
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 110
- 239000010703 silicon Substances 0.000 claims description 109
- 229910052710 silicon Inorganic materials 0.000 claims description 109
- 239000000460 chlorine Substances 0.000 claims description 71
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 67
- 229910052801 chlorine Inorganic materials 0.000 claims description 67
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 65
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 55
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 55
- 230000007246 mechanism Effects 0.000 claims description 36
- 239000000758 substrate Substances 0.000 claims description 30
- 239000002245 particle Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 235000012431 wafers Nutrition 0.000 description 55
- 239000006227 byproduct Substances 0.000 description 37
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 35
- 238000010586 diagram Methods 0.000 description 26
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 19
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 19
- 239000013078 crystal Substances 0.000 description 18
- 230000008569 process Effects 0.000 description 15
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 14
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 13
- 229910000077 silane Inorganic materials 0.000 description 13
- 230000007423 decrease Effects 0.000 description 12
- 230000008021 deposition Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000001294 propane Substances 0.000 description 7
- 239000012159 carrier gas Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000002019 doping agent Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000010574 gas phase reaction Methods 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 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
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000399 optical microscopy Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
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- 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
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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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- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
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Description
第1の実施形態の気相成長装置は、反応室と、反応室の中に設けられ基板を載置するホルダと、シリコンと塩素を含む第1のソースガスを反応室の中に供給する第1のソースガス流路と、シリコンと塩素を含み、第1のソースガスのシリコンの原子濃度よりもシリコンの原子濃度が低いパージガスを反応室の中に供給するパージガス流路と、を備える。
図10は、第1の実施形態の気相成長装置の変形例のガス導入部の一部の拡大模式断面図である。図10は、パージガス導管75、74を含む断面図である。図10は、図4に対応する断面である。
第2の実施形態の気相成長装置及び気相成長方法は、ソースガスが1種類である点で第1の実施形態の紀伊相成長装置及び気相成長方法と異なる。以下、第1の実施形態と重複する内容については、一部記述を省略する場合がある。
第3の実施形態の気相成長装置及び気相成長方法は、気相成長装置が横型の気相成長装置である点で、第2の実施形態の気相成長装置及び気相成長方法と異なる。以下、第1の実施形態又は第2の実施形態と重複する内容については、一部記述を省略する場合がある。
第4の実施形態の気相成長装置は、ガス導入部は、ソースガス導管に取り付けられるコンダクタンス調整機構を、更に含む点で、第1の実施形態の気相成長装置と異なる。以下、第1の実施形態と重複する内容については、一部記述を省略する場合がある。
11 SiC膜(炭化珪素膜)
12 ガス導入部
14 サセプタ(ホルダ)
51、56 ソースガス領域
53、54、55 パージガス領域
60 整流板(仕切り板)
57 パージガス領域
60a、60b、62a、63a、64a 穴
62、63、64、67 仕切り板
71、77 ソースガス導管
74、75、78 パージガス導管
79 コンダクタンス調整機構
100 気相成長装置
200 気相成長装置
300 気相成長装置
G1 ソースガス
G2 ソースガス
G3 パージガス
Gx ソースガス
Gy パージガス
W ウェハ(基板)
Claims (17)
- 反応室と、
前記反応室の中に設けられ基板を載置するホルダと、
シリコンと塩素を含む第1のソースガスを前記反応室の中に供給する第1のソースガス流路と、
シリコンと塩素を含み、前記第1のソースガスのシリコンの原子濃度よりもシリコンの原子濃度が低いパージガスを前記反応室の中に供給するパージガス流路と、
前記第1のソースガス流路と前記パージガス流路との間に設けられたガスのリーク経路と、
を備える気相成長装置。 - 前記パージガスの塩素の原子濃度は、前記第1のソースガスの塩素の原子濃度よりも低い請求項1記載の気相成長装置。
- 炭素を含む第2のソースガスを前記反応室の中に供給する第2のソースガス流路を、更に備える請求項1記載の気相成長装置。
- 前記パージガスは、水素ガスを含む請求項1記載の気相成長装置。
- 反応室と、
前記反応室の中に設けられ基板を載置するホルダと、
前記反応室の上に設けられたガス導入部であって、
シリコンと塩素を含むソースガスが導入されるソースガス領域と、前記ソースガス領域と前記反応室との間に設けられ、塩素を含むパージガスが導入されるパージガス領域と、前記ソースガス領域と前記パージガス領域との間に設けられる第1の仕切り板と、前記パージガス領域と前記反応室との間に設けられる第2の仕切り板と、前記第1の仕切り板と前記第2の仕切り板とを貫通し、前記ソースガスを前記反応室に供給するソースガス導管と、前記第2の仕切り板を貫通し、前記ソースガス導管が挿入され、前記ソースガス導管との間隙から前記ソースガスのシリコンの原子濃度よりも低い原子濃度のシリコンを含む前記パージガスを前記反応室に供給するパージガス導管と、を含み、前記ソースガス導管と前記第1の仕切り板との間に間隙を有するガス導入部と、
を備える気相成長装置。 - 前記ガス導入部は、前記ソースガス導管に取り付けられるコンダクタンス調整機構を、更に含む請求項5記載の気相成長装置。
- 前記パージガスの塩素の原子濃度は、前記ソースガスの塩素の原子濃度よりも低い請求項5記載の気相成長装置。
- 前記パージガスは、水素ガスを含む請求項5記載の気相成長装置。
- 反応室と、前記反応室の中に設けられ基板を載置するホルダと、ソースガスを前記反応室の中に供給するソースガス流路と、パージガスを前記反応室の中に供給するパージガス流路と、前記ソースガス流路と前記パージガス流路との間に設けられたガスのリーク経路と、を備える気相成長装置を用いた気相成長方法であって、
前記ソースガス流路から、シリコンと塩素を含む前記ソースガスを前記反応室に供給し、
前記パージガス流路から、シリコンと塩素を含み、前記ソースガスよりもシリコンの原子濃度が低いパージガスを前記反応室に供給し、
前記基板の表面に炭化珪素膜を形成する気相成長方法。 - 前記パージガスの塩素の原子濃度は、前記ソースガスの塩素の原子濃度よりも低い請求項9記載の気相成長方法。
- 前記パージガスは、水素ガスを含む請求項9記載の気相成長方法。
- 前記ソースガス流路は、前記ソースガスが導入されるソースガス領域と前記ソースガス領域から前記反応室に前記ソースガスを供給するソースガス導管を備え、
前記パージガス流路は、前記パージガスが導入されるパージガス領域と前記パージガス領域から前記反応室に前記パージガスを供給するパージガス導管を備え、
前記パージガス領域の内圧は、前記ソースガス領域の内圧以上とする請求項9記載の気相成長方法。 - 前記ソースガスは水素ガスを含み、前記パージガスは水素ガスを含み、前記ソースガス領域に導入される水素ガス又は前記パージガス領域に導入される水素ガスの供給量を調整して前記パージガス領域の内圧又は前記ソースガス領域の内圧を調整する請求項12記載の気相成長方法。
- 前記ソースガス導管又は前記パージガス導管のコンダクタンスを調整して前記パージガス領域の内圧又は前記ソースガス領域の内圧を調整する請求項12記載の気相成長方法。
- 前記ソースガス流路は、前記ソースガスが導入されるソースガス領域と前記ソースガス領域から前記反応室に前記ソースガスを供給するソースガス導管を備え、
前記パージガス流路は、前記パージガスが導入されるパージガス領域と前記パージガス領域から前記反応室に前記パージガスを供給するパージガス導管を備え、
前記ソースガスは水素ガスを含み、前記パージガスは水素ガスを含み、前記基板の表面に供給されるシリコン含有パーティクルの密度が、100個/cm2以下となるように、前記ソースガス領域に導入される水素ガス又は前記パージガス領域に導入される水素ガスの供給量を調整する請求項9記載の気相成長方法。 - 前記ソースガス流路は、前記ソースガスが導入されるソースガス領域と前記ソースガス領域から前記反応室に前記ソースガスを供給するソースガス導管を備え、
前記パージガス流路は、前記パージガスが導入されるパージガス領域と前記パージガス領域から前記反応室に前記パージガスを供給するパージガス導管を備え、
前記ソースガスは水素ガスを含み、前記パージガスは水素ガスを含み、前記基板の表面に供給されるシリコン含有パーティクルの密度が、10個/cm2以下となるように、前記ソースガス領域に導入される水素ガス又は前記パージガス領域に導入される水素ガスの供給量を調整する請求項9記載の気相成長方法。 - 前記ソースガス流路は、前記ソースガスが導入されるソースガス領域と前記ソースガス領域から前記反応室に前記ソースガスを供給するソースガス導管を備え、
前記パージガス流路は、前記パージガスが導入されるパージガス領域と前記パージガス領域から前記反応室に前記パージガスを供給するパージガス導管を備え、
前記ソースガスは水素ガスを含み、前記パージガスは水素ガスを含み、前記基板の表面に供給されるシリコン含有パーティクルの密度が、1.0個/cm2以下となるように、前記ソースガス領域に導入される水素ガス又は前記パージガス領域に導入される水素ガスの供給量を調整する請求項9記載の気相成長方法。
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