JP6725096B2 - シリコン系溶融組成物およびこれを用いたSiC単結晶の製造方法 - Google Patents
シリコン系溶融組成物およびこれを用いたSiC単結晶の製造方法 Download PDFInfo
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 166
- 229910052710 silicon Inorganic materials 0.000 title claims description 143
- 239000010703 silicon Substances 0.000 title claims description 113
- 239000013078 crystal Substances 0.000 title claims description 98
- 239000000203 mixture Substances 0.000 title claims description 49
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 191
- 239000002184 metal Substances 0.000 claims description 190
- 125000004429 atom Chemical group 0.000 claims description 112
- 229910052799 carbon Inorganic materials 0.000 claims description 66
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 57
- 238000011156 evaluation Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 24
- 150000001721 carbon Chemical group 0.000 claims description 23
- 229910052706 scandium Inorganic materials 0.000 claims description 23
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 23
- 229910052782 aluminium Inorganic materials 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 150000002739 metals Chemical class 0.000 claims description 17
- 229910003460 diamond Inorganic materials 0.000 claims description 15
- 239000010432 diamond Substances 0.000 claims description 15
- 239000000155 melt Substances 0.000 claims description 14
- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 10
- 238000003775 Density Functional Theory Methods 0.000 claims description 8
- 102100021164 Vasodilator-stimulated phosphoprotein Human genes 0.000 claims description 7
- 108010054220 vasodilator-stimulated phosphoprotein Proteins 0.000 claims description 7
- 238000004781 supercooling Methods 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 2
- 229910052802 copper Inorganic materials 0.000 claims 2
- 230000000052 comparative effect Effects 0.000 description 26
- 229910002804 graphite Inorganic materials 0.000 description 15
- 239000010439 graphite Substances 0.000 description 15
- 238000004364 calculation method Methods 0.000 description 13
- 239000011651 chromium Substances 0.000 description 12
- 239000010936 titanium Substances 0.000 description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 9
- 229910052804 chromium Inorganic materials 0.000 description 9
- 238000005457 optimization Methods 0.000 description 9
- 229910052719 titanium Inorganic materials 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 8
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 7
- 229910052726 zirconium Inorganic materials 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 2
- 238000000815 Acheson method Methods 0.000 description 1
- -1 and as an example Chemical compound 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000329 molecular dynamics simulation Methods 0.000 description 1
- 238000004698 pseudo-potential method Methods 0.000 description 1
- 230000003362 replicative effect Effects 0.000 description 1
- 238000005092 sublimation method Methods 0.000 description 1
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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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Description
Csi sol=A−B+μ1−μ2 式(1)
Csi sol=A−B+μ1−μ2 式(1)
Csi sol=A−B+μ1−μ2 式(1)
Csi sol=A−B+μ1−μ2 式(1)
Claims (18)
- シリコン、炭素、および下記式(1)で定義される溶解度パラメータ(Csi sol)に対して−0.37より小さい値を有する金属を含み、
溶液法によってSiC単結晶を形成するためのシリコン系溶融組成物:
Csi sol=A−B+μ1−μ2 式(1)
式中、Aは、金属原子および炭素原子を含むシリコン結晶格子において、金属原子、炭素原子、およびシリコン原子を含む第1評価格子が有する第1エネルギー(A)であり、Bは、金属原子を含むシリコン結晶格子において、金属原子およびシリコン原子を含む第2評価格子が有する第2エネルギー(B)であり、μ1は、ダイヤモンド結晶構造のシリコンの総エネルギーを単位格子内に存在するシリコン原子数で割った化学ポテンシャルであって−5.422の定数であり、μ2は、ダイヤモンド結晶構造の炭素の総エネルギーを単位格子内に存在する炭素原子数で割った化学ポテンシャルであって−9.097の定数であり、
前記金属は、アルミニウム(Al)、およびスカンジウム(Sc)を含み、銅(Cu)を含まない、
シリコン系溶融組成物。 - 前記金属は、アルミニウム(Al)、およびスカンジウム(Sc)からなる、
請求項1に記載のシリコン系溶融組成物。 - 前記金属は、上記式(1)で定義される溶解度パラメータ(Csi sol)に対して−0.90<Csi sol<−0.38の値を有する、請求項1または2に記載のシリコン系溶融組成物。
- 前記金属は、前記シリコンおよび金属の総含有量100重量部を基準として25〜85重量部含まれる、請求項1から3のいずれか一項に記載のシリコン系溶融組成物。
- 前記金属は、前記シリコンおよび金属の総含有量100重量部を基準として60〜70重量部含まれる、請求項1から4のいずれか一項に記載のシリコン系溶融組成物。
- SiC種結晶を準備する段階と、
シリコン、炭素、および金属を含む溶融液を準備する段階と、
前記溶融液を過冷却させて、前記種結晶上にSiC単結晶を成長させる段階とを含み、
前記金属は、下記式(1)で定義される溶解度パラメータ(Csi sol)に対して−0.37より小さい値を有するSiC単結晶の製造方法:
Csi sol=A−B+μ1−μ2 式(1)
式中、Aは、金属原子および炭素原子を含むシリコン結晶格子において、金属原子、炭素原子、およびシリコン原子を含む第1評価格子が有する第1エネルギー(A)であり、Bは、金属原子を含むシリコン結晶格子において、金属原子およびシリコン原子を含む第2評価格子が有する第2エネルギー(B)であり、μ1は、ダイヤモンド結晶構造のシリコンの総エネルギーを単位格子内に存在するシリコン原子数で割った化学ポテンシャルであって−5.422の第1定数であり、μ2は、ダイヤモンド結晶構造の炭素の総エネルギーを単位格子内に存在する炭素原子数で割った化学ポテンシャルであって−9.097の第2定数であり、
前記金属は、アルミニウム(Al)、およびスカンジウム(Sc)を含み、銅(Cu)を含まない、
シリコン系溶融組成物である。 - 前記金属は、アルミニウム(Al)、およびスカンジウム(Sc)からなる、
請求項6に記載のSiC単結晶の製造方法。 - 前記金属は、上記式(1)で定義される溶解度パラメータ(Csi sol)に対して−0.90<Csi sol<−0.38の値を有する、請求項6または7に記載のSiC単結晶の製造方法。
- 前記金属は、前記シリコンおよび金属の総含有量100重量部を基準として25〜85重量部含まれる、請求項6から8のいずれか一項に記載のSiC単結晶の製造方法。
- 前記金属は、前記シリコンおよび金属の総含有量100重量部を基準として60〜70重量部含まれる、請求項6から9のいずれか一項に記載のSiC単結晶の製造方法。
- 前記第1評価格子内において、前記金属原子、前記炭素原子、および前記シリコン原子に作用する原子間力が±0.01eV/Å以下である、請求項6から10のいずれか一項に記載のSiC単結晶の製造方法。
- 前記第2評価格子内において、前記金属原子および前記シリコン原子に作用する原子間力が±0.01eV/Å以下である、請求項6から11のいずれか一項に記載のSiC単結晶の製造方法。
- 前記第1エネルギーは、
シリコン結晶格子において、シリコン原子を前記金属原子で置換する段階と、
シリコン原子を前記炭素原子で置換して、前記第1評価格子を形成する段階とにより導出される、請求項6から12のいずれか一項に記載のSiC単結晶の製造方法。 - 前記第2エネルギーは、
シリコン結晶格子において、シリコン原子を前記金属原子で置換して、第2評価格子を形成する段階により導出される、請求項13に記載のSiC単結晶の製造方法。 - 前記金属原子は、互いに異なる第1金属原子および第2金属原子を含み、
前記第1金属原子と前記第2金属原子との間の距離は、5Å以下である、請求項14に記載のSiC単結晶の製造方法。 - 前記第1評価格子は、前記炭素原子を基準として半径6Å以内に位置する前記炭素原子、前記シリコン原子、および前記金属原子を含む、請求項13から15のいずれか一項に記載のSiC単結晶の製造方法。
- 前記第2評価格子は、前記金属原子に隣接して位置するシリコン原子を基準として半径6Å以内に位置するシリコン原子および前記金属原子を含む、請求項14から16のいずれか一項に記載のSiC単結晶の製造方法。
- 前記第1エネルギー、前記第2エネルギー、前記第1定数、および前記第2定数は、VASPコードを用いた汎密度関数方法(DFT、Density Functional Theory)を用いて導出する、請求項6から17のいずれか一項に記載のSiC単結晶の製造方法。
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