JP7042996B2 - ウエハ及びウエハの製造方法 - Google Patents
ウエハ及びウエハの製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 28
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 87
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 85
- 239000013078 crystal Substances 0.000 claims description 41
- 239000011810 insulating material Substances 0.000 claims description 36
- 238000009826 distribution Methods 0.000 claims description 25
- 239000002994 raw material Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 18
- 238000005498 polishing Methods 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 15
- 239000011261 inert gas Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 7
- 238000002441 X-ray diffraction Methods 0.000 claims description 6
- 235000012431 wafers Nutrition 0.000 description 108
- 239000012071 phase Substances 0.000 description 46
- 230000007547 defect Effects 0.000 description 16
- 238000002360 preparation method Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
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- 230000008859 change Effects 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000002017 high-resolution X-ray diffraction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000000704 physical effect Effects 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Description
炭化珪素単結晶を製造する方法として、液相蒸着法(Liquid Phase Epitaxy;LPE)、化学気相蒸着法(Chemical Vapor Deposition;CVD)、物理的気相輸送法(Physical Vapor Transport;PVT)などがある。その中で物理的気相輸送法は、坩堝内に炭化珪素原料を装入し、坩堝の上端には、炭化珪素単結晶からなる種結晶を配置した後、坩堝を誘導加熱方式で加熱することによって原料を昇華させ、種結晶上に炭化珪素単結晶を成長させる方法である。
i)前記位相差の平均値が38nm以下;及び
ii)前記位相差の最大値が60nm以下
100 炭化珪素インゴット
200 反応容器
210 本体
220 蓋
300 原料物質
400 断熱材
500 反応チャンバ
600 加熱手段
700 真空排気装置
800 マスフローコントローラ
810 配管
Claims (9)
- 520nmの波長の光で測定した位相差の分布を有し、
前記位相差の平均値が38nm以下であり、
マイクロパイプを有し、
前記マイクロパイプの密度が1.5/cm2以下である、炭化珪素ウエハ。 - 520nmの波長の光で測定した位相差の分布を有し、
前記位相差の最大値は60nm以下であり、
マイクロパイプを有し、
前記マイクロパイプの密度が1.5/cm2以下である、炭化珪素ウエハ。 - 前記炭化珪素ウエハは、一面、及びその反対面である他面を含み、
前記炭化珪素ウエハの一面の全体Ra平均粗さは0.3nm未満である、請求項1又は2に記載の炭化珪素ウエハ。 - XRD分析によるロッキングカーブの半値全幅(FWHM)値が30arcsec以下である、請求項1又は2に記載の炭化珪素ウエハ。
- 直径が4インチ以上であり、4H構造の炭化珪素を含む、請求項1又は2に記載の炭化珪素ウエハ。
- 内部空間を有する反応容器に、原料物質と炭化珪素種結晶を互いに対向するように配置する準備ステップと;
前記内部空間の温度、圧力及び雰囲気を調節することによって前記原料物質を昇華させ、前記種結晶から成長した炭化珪素インゴットを設ける成長ステップと;
前記反応容器を冷却させ、前記炭化珪素インゴットを回収する冷却ステップと;
回収された前記炭化珪素インゴットを切断することによってウエハを設ける切断ステップと;
前記設けられたウエハの厚さを平坦化し、表面を研磨する加工ステップと;を含み、
前記反応容器は、外面を取り囲む断熱材と、前記反応容器又は前記内部空間の温度を調節する加熱手段と、を含み、
前記断熱材の密度は、0.14g/cc~0.28g/ccで、
前記断熱材の熱膨張係数は、2.65×10-6/℃~3.05×10-6/℃で、
前記加工ステップが行われたウエハは、520nmの波長の光で測定した位相差の分布を有し、下記のi)及びii)事項のうち一つ以上を有する、ウエハの製造方法。
i)前記位相差の平均値が38nm以下;及び
ii)前記位相差の最大値が60nm以下 - 前記成長ステップでは、前記原料物質で炭化珪素種結晶の方向に不活性気体が流れ、
前記不活性気体の流量は、70sccm以上、300sccm以下である、請求項6に記載のウエハの製造方法。 - 前記加工ステップの表面を研磨する過程は、化学的機械的研磨ステップをさらに含む、請求項6に記載のウエハの製造方法。
- 前記加工ステップが行われたウエハは、XRD分析によるロッキングカーブの半値全幅(FWHM)値が30arcsec以下である、請求項6に記載のウエハの製造方法。
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KR1020200086798A KR102192518B1 (ko) | 2020-07-14 | 2020-07-14 | 웨이퍼 및 웨이퍼의 제조방법 |
KR10-2020-0086798 | 2020-07-14 |
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JP2022018072A JP2022018072A (ja) | 2022-01-26 |
JP7042996B2 true JP7042996B2 (ja) | 2022-03-29 |
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US (2) | US11289576B2 (ja) |
EP (1) | EP3940122B1 (ja) |
JP (1) | JP7042996B2 (ja) |
KR (1) | KR102192518B1 (ja) |
CN (1) | CN114108092A (ja) |
HU (1) | HUE065016T2 (ja) |
PL (1) | PL3940122T3 (ja) |
TW (1) | TWI758186B (ja) |
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US11862685B2 (en) | 2024-01-02 |
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KR102192518B1 (ko) | 2020-12-17 |
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