JP2020033239A - 熱伝導異方性SiC材 - Google Patents
熱伝導異方性SiC材 Download PDFInfo
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- JP2020033239A JP2020033239A JP2018162677A JP2018162677A JP2020033239A JP 2020033239 A JP2020033239 A JP 2020033239A JP 2018162677 A JP2018162677 A JP 2018162677A JP 2018162677 A JP2018162677 A JP 2018162677A JP 2020033239 A JP2020033239 A JP 2020033239A
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- 239000000463 material Substances 0.000 title claims abstract description 31
- 239000013078 crystal Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 229910010271 silicon carbide Inorganic materials 0.000 description 31
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 30
- 235000012431 wafers Nutrition 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- C30B25/02—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
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/36—Carbides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/673—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere using specially adapted carriers or holders; Fixing the workpieces on such carriers or holders
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Ceramic Products (AREA)
Abstract
Description
特許文献1に開示の炭化珪素基板は、熱伝導率の異なる第1及び第2の層からなり、高周波損失がなくかつ優れた放熱性を付与している。
上記第1の手段によれば、SiC材について面内方向の熱伝導度を板厚方向よりも優れた熱伝導度を付与することができる。また、半値幅が狭くなり(111)面の結晶面を精度良く揃えることができる。
さらに不純物に由来する結晶粒界の偏析がなくなり、面内方向の熱伝導を阻害する因子を除去できる。
従って、例えば、Siウェハエッチング装置であれば面内温度分布を良好に保ち、高温プロセス側から装置側となる板厚方向への熱を伝えにくくさせたいとの要求、換言すると装置側の熱負荷を低減して、プロセス側の熱分布の均一性をもたらすことができる要求などに対応できる。
[熱伝導異方性SiC材]
本発明の熱伝導異方性SiC材は、一例として1000℃〜1400℃のCVD炉内でSiCl4とCH4を希釈ガスのH2と共に供給することなどにより形成している。また成膜速度を0.2μm/分〜2μm/分に調整している。
図1は本発明の熱伝導異方性SiC材の模式図であり(A)は結晶構造、(B)は基板の説明図である。図示のように本発明の熱伝導異方性SiC材は、(111)面を基板の板厚方向に垂直に配向させると板厚と平行な面からみるとC面とSi面が交互に現れる構造となる。このとき面内方向ではC面内、Si面内に高熱伝導度を利用できる。一方、板厚方向ではC面とSi面の繋がりになり低熱伝導度を利用できる。
図2は配向性の悪いSiC材の物性データを示す図である。図3は本発明の熱伝導異方性SiC材の物性データを示す図である。図2,3はいずれも縦軸が強度(Counts)、横軸が2θ(deg)を示している。
図2に示すように、配向性の悪いSiC材は条件が適正でなく、βが半値幅であり配向性が悪い。
図3に示すように本発明の熱伝導異方性SiC材は配向性が高く、熱伝導異方性を付与できる。
また面内方向の熱伝導度は280(W/m・K)であり、板厚方向の熱伝導度は100〜130(W/m・K)である。
図4は本発明の熱伝導異方性SiC材を用いたSiウェハエッチング装置の説明図である。図示のように本発明の熱伝導異方性SiC材は、Siウェハエッチング装置(装置本体10)の上部電極板20に適用することができる。より具体的な上部電極板20の構成は、熱伝導異方性SiC材の(111)面が電極板の厚み方向と垂直、換言すると電極板の長手方向に沿って配置させている。このような電極板は厚み方向にSiが並ぶ面とCが並ぶ面が積層する構成となっている。
以上、本発明の好ましい実施形態について説明した。しかしながら、本発明は、上記実施形態に何ら制限されることなく、本発明の主旨を逸脱しない範囲において、種々の変更が可能である。
また、本発明は、実施形態において示された組み合わせに限定されることなく、種々の組み合わせによって実施可能である。
20 上部電極板
Claims (1)
- β−SiC材からなり、(111)面を板厚方向に対して垂直方向に配向させて、前記(111)面のXRDピークの半値幅が2θ/θ測定法で0.25度以下であり、不純物量が500ppm以下であり、結晶粒界が前記板厚方向に70%以上平行に存在することを特徴とする熱伝導異方性SiC材。
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JP2018162677A JP6889133B2 (ja) | 2018-08-31 | 2018-08-31 | 熱伝導異方性SiC材 |
PCT/JP2018/034062 WO2020044571A1 (ja) | 2018-08-31 | 2018-09-13 | 熱伝導異方性SiC材 |
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JP2018162677A JP6889133B2 (ja) | 2018-08-31 | 2018-08-31 | 熱伝導異方性SiC材 |
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JP2020033239A true JP2020033239A (ja) | 2020-03-05 |
JP6889133B2 JP6889133B2 (ja) | 2021-06-18 |
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JP2018162677A Active JP6889133B2 (ja) | 2018-08-31 | 2018-08-31 | 熱伝導異方性SiC材 |
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WO (1) | WO2020044571A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1179846A (ja) * | 1997-09-01 | 1999-03-23 | Tokai Carbon Co Ltd | 炭化珪素成形体 |
JPH11228297A (ja) * | 1998-02-10 | 1999-08-24 | Japan Atom Energy Res Inst | 立方晶炭化珪素単結晶薄膜の作製方法 |
JP2002047066A (ja) * | 2000-08-02 | 2002-02-12 | Tokai Carbon Co Ltd | SiC成形体およびその製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011074436A (ja) * | 2009-09-30 | 2011-04-14 | Covalent Materials Corp | 炭化ケイ素材料 |
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- 2018-08-31 JP JP2018162677A patent/JP6889133B2/ja active Active
- 2018-09-13 WO PCT/JP2018/034062 patent/WO2020044571A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1179846A (ja) * | 1997-09-01 | 1999-03-23 | Tokai Carbon Co Ltd | 炭化珪素成形体 |
JPH11228297A (ja) * | 1998-02-10 | 1999-08-24 | Japan Atom Energy Res Inst | 立方晶炭化珪素単結晶薄膜の作製方法 |
JP2002047066A (ja) * | 2000-08-02 | 2002-02-12 | Tokai Carbon Co Ltd | SiC成形体およびその製造方法 |
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WO2020044571A1 (ja) | 2020-03-05 |
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