JP7042995B2 - 炭化珪素ウエハ及び炭化珪素ウエハの製造方法 - Google Patents
炭化珪素ウエハ及び炭化珪素ウエハの製造方法 Download PDFInfo
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 124
- 229910010271 silicon carbide Inorganic materials 0.000 title claims description 121
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 238000005259 measurement Methods 0.000 claims description 125
- 239000013078 crystal Substances 0.000 claims description 36
- 239000011810 insulating material Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 19
- 239000012298 atmosphere Substances 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 13
- 238000005498 polishing Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 235000012431 wafers Nutrition 0.000 description 87
- 238000010438 heat treatment Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 238000002017 high-resolution X-ray diffraction Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000005092 sublimation method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000013507 mapping Methods 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
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- 239000000758 substrate Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
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Description
SiC粒子が含まれた粉末をグラファイト坩堝本体の内部に装入した。前記粉末の上部に炭化珪素種結晶及び種結晶ホルダを配置した。このとき、炭化珪素種結晶(4H SiC単結晶、6インチ)のC面(0001)が坩堝の下部に向かうように通常の方法で固定し、以下の実施例と比較例の全てに同一に適用した。
高分解能X線回折分析システム(HR-XRD system、Rigaku社のSmartLab High Resolution X-ray Diffraction System)を適用して、前記実施例と比較例のウエハの[11-20]方向をX線経路に合わせ、X-ray source opticとX-ray detector optic角度を2θ(35~36°)に設定した後、ウエハのオフ角度に合わせてオメガ(ω、又はシータθ、X-ray detector optic)角度を調節して測定した。具体的には、4°オフを基準として、オメガ角度は13.811°を適用した。
図1は、具現例に係る実施例1のロッキングカーブグラフ(Rocking Curve Graph)であり、図2は、具現例に係る実施例2のロッキングカーブグラフ(Rocking Curve Graph)であり、図3は、具現例に係るウエハWにおいて対象領域Tと測定点Pを説明する概念図である。
Claims (3)
- (0001)面を基準として0~15°から選択された角度のオフアングルを適用した4インチ以上のウエハであり、
測定点は、前記ウエハの表面を10mm以下の一定の間隔で区分した複数の地点であり、
対象領域は、前記ウエハの中心を共有し、前記ウエハの半径の90%である半径を有する円の内部に該当する領域であり、
前記対象領域は1cm 2 当たり1個以上の測定点を含み、
前記測定点のロッキングカーブ曲線はピークと半値幅を有し、
オメガ角度の平均値は、前記対象領域の測定点のピークが有するオメガ角度の平均であり、
前記半値幅は、前記オメガ角度の平均値を基準とする値であり、
前記測定点のオメガ角度は、前記測定点のピークでのオメガ角度であり、
第1測定点は、前記測定点のピークの中で最大のオメガ角度を有する地点であり、
第2測定点は、前記測定点のピークの中で最小のオメガ角度を有する地点であり、
前記オメガ角度は、13.7~14.2°の範囲に含まれ、
前記対象領域は、前記半値幅が-0.05~0.05°以内である測定点を98%以上含み、
前記対象領域において前記第1測定点のオメガ角度と前記第2測定点のオメガ角度との差は0.5°以内である、炭化珪素ウエハ。 - 前記対象領域は、前記半値幅が-1.5°未満または1.5°超である測定点を5%以下で含む、請求項1に記載の炭化珪素ウエハ。
- 炭化珪素インゴットの製造方法により製造されるウエハの製造方法であって、
前記炭化珪素インゴットの製造方法は、
坩堝本体内に原料を、そして、前記坩堝本体上に、炭化珪素シードが位置する坩堝蓋を配置した後、密度が0.14~0.28g/ccである断熱材で前記坩堝本体を取り囲んで反応容器を設ける準備ステップと、
前記反応容器を反応チャンバ内に位置させ、前記反応容器の内部を結晶成長雰囲気に調節して、前記原料が前記炭化珪素シードに蒸気移送されて蒸着され、前記炭化珪素シードから成長させた炭化珪素インゴットを設ける成長ステップと、
前記断熱材は、圧縮強度が0.2Mpa以上である炭素系フェルトを含み、
前記断熱材は、気孔度が72~95%であるものであり、
前記成長ステップは、2000~2500℃の成長温度及び1~200torrの成長圧力の条件が適用され、
前記ウエハの製造方法は、
炭化珪素インゴットを、(0001)面を基準として0~15°から選択されたいずれか一つの角度になるようにオフアングルを適用してスライスした、スライスされた結晶を設けるスライシングステップと、
前記スライスされた結晶を研磨して4インチ以上の炭化珪素ウエハを形成する研磨ステップとを含み、
測定点は、前記ウエハの表面を10mm以下の一定の間隔で区分した複数の地点であり、
対象領域は、前記ウエハの中心を共有し、前記ウエハの半径の90%である半径を有する円の内部に該当する領域であり、
前記対象領域は、1cm 2 当たり1個以上の測定点を含み、
前記測定点のロッキングカーブ曲線はピークと半値幅を有し、
オメガ角度の平均値は、前記対象領域の測定点のピークが有するオメガ角度の平均であり、
前記半値幅は、前記オメガ角度の平均値を基準とする値であり、
測定点のオメガ角度は、前記測定点のピークでのオメガ角度であり、
第1測定点は、前記測定点のピークの中で最大のオメガ角度を有する地点であり、
第2測定点は、前記測定点のピークの中で最小のオメガ角度を有する地点であり、
前記オメガ角度は、13.7~14.2°の範囲に含まれ、
前記対象領域は、前記半値幅が-0.05~0.05°以内である測定点を98%以上含み、
前記対象領域において前記第1測定点のオメガ角度と前記第2測定点のオメガ角度との差は0.5°以内である、ウエハの製造方法。
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TWI799940B (zh) * | 2021-08-10 | 2023-04-21 | 環球晶圓股份有限公司 | 碳化矽材料驗證方法及裝置 |
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