JP5321157B2 - 単結晶炭化珪素基板の加工方法 - Google Patents
単結晶炭化珪素基板の加工方法 Download PDFInfo
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- JP5321157B2 JP5321157B2 JP2009055805A JP2009055805A JP5321157B2 JP 5321157 B2 JP5321157 B2 JP 5321157B2 JP 2009055805 A JP2009055805 A JP 2009055805A JP 2009055805 A JP2009055805 A JP 2009055805A JP 5321157 B2 JP5321157 B2 JP 5321157B2
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- silicon carbide
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- 239000000758 substrate Substances 0.000 title claims description 86
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 40
- 238000000034 method Methods 0.000 title claims description 25
- 229910021421 monocrystalline silicon Inorganic materials 0.000 title claims description 23
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 13
- 239000011863 silicon-based powder Substances 0.000 claims description 12
- 230000003746 surface roughness Effects 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 3
- 229920005591 polysilicon Polymers 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000843 powder Substances 0.000 description 23
- 238000007639 printing Methods 0.000 description 17
- 239000012535 impurity Substances 0.000 description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000011179 visual inspection Methods 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 239000002210 silicon-based material Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910021642 ultra pure water Inorganic materials 0.000 description 2
- 239000012498 ultrapure water Substances 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- 238000005488 sandblasting Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Description
符号1は、走査型レーザー照射装置であり、YAG固体レーザー発振のものである。予め設定した文字を対象物に対して自身が走査し、照射できる。波長は1064nmであり、レーザー出力は2ワットとした。符号2は、両面鏡面研磨し平均の面粗度Raが50nm以下となり透明化した4H型単結晶炭化珪素基板であり、直径50mm、厚さ0.35mmのものである。符号3は、レーザー光の軌跡を表現したものであり、線先にある部位4が予め炭化珪素基板に炭化珪素粉を塗布してある部分である。図2は、塗布部位を示す平面図である。符号4の塗布の具体的な方法を述べる。金属不純物濃度が1ppm以下、平均粒径が1μmの市販の炭化珪素単結晶粉を20gほど、50mlのエチルアルコールの入ったビーカーに攪拌しながら徐々に投入した。その溶液を、柔らかい刷毛を用いて、基板の印字加工部位周辺に塗り、80℃のホットプレート上で基板を温め、エタノールを昇華させることにより基板上に粉を定着させた。塗布した量は目視にてムラ無く基板表面が見えなくなる程度であり、別途用意した同方法にて塗布した基板の粉体付着部分の厚さ断面を顕微鏡で観察したところ、約10〜20μmであった。
さらに同様の実験構成で、基板の表面粗さだけ変えた、Raが25nm、50nm、及び75nmの3種類の基板を用意し、溶剤に混ぜた炭化珪素単結晶粉末を塗布することなくレーザー照射を行ったところ、Ra25nmの基板ではレーザーが透過し印字不能であった。Ra50nmの基板ではレーザー熱で加工痕が見られ、視認性はあるものの文字の線が部分的に途切れていた。Ra75nmの基板では視認性のあるはっきりとした文字が印字できた。Ra75nmの基板では表面の凹凸でレーザー光が乱反射して、レーザー光が熱に変わり、基板表面を溶かして、レーザーによる加工を促進したため、と思われる。反対にRaが50nm以下では光透過性が増し、レーザー光が基板を通過し、熱に変換できずに、印字が困難になった。
2 : 基板
3 : レーザー光
4 : 粉体塗布部位
5 : 印字
6 : 切断部位
7 : 溝
8 : 基板断面
9 : 切断部位
10 : 発光素子
11 : 受光素子
12 : 基板
Claims (4)
- 平均の面粗度Raが50nm以下であって光透過性を有する両面鏡面研磨後の単結晶炭化珪素基板の表面の少なくとも一部に、ポリシリコン、一酸化珪素、二酸化珪素、炭化珪素、及び窒化珪素から選ばれた1種又は2種以上の珪素系粉末を塗布し、その塗布部位にレーザー照射を行い、前記基板表面に溝を形成することを特徴とする単結晶炭化珪素基板の加工方法。
- 前記単結晶炭化珪素基板の結晶が、4H型、又は6H型である請求項1に記載の単結晶炭化珪素基板の加工方法。
- 前記珪素系粉末を溶剤と混合し、単結晶炭化珪素基板に塗布、乾燥した後、レーザー照射を行う請求項1又は2に記載の単結晶炭化珪素基板の加工方法。
- 前記レーザーの波長が500nm以上である請求項1〜3のいずれかに記載の単結晶炭化珪素基板の加工方法。
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US8722507B2 (en) | 2011-01-06 | 2014-05-13 | Hitachi Metals, Ltd. | Method for forming identification marks on silicon carbide single crystal substrate, and silicon carbide single crystal substrate |
JP5990432B2 (ja) * | 2011-09-02 | 2016-09-14 | イビデン株式会社 | ハニカム成形体の切断方法及びハニカム構造体の製造方法 |
JP6158468B2 (ja) * | 2011-11-08 | 2017-07-05 | 富士電機株式会社 | 半導体装置の故障位置解析方法及び装置 |
JP5872989B2 (ja) * | 2011-12-13 | 2016-03-01 | 京セラ株式会社 | セラミック部材およびこれを用いた半導体製造装置用部材、ならびにマーキング方法 |
JP2014128914A (ja) * | 2012-12-28 | 2014-07-10 | Sumitomo Metal Mining Co Ltd | マークが形成された基板の製造方法、マークが形成された基板 |
JP6001509B2 (ja) * | 2013-07-03 | 2016-10-05 | 信越化学工業株式会社 | 光透過性基板のマーキング方法および光透過性基板 |
JP2016139642A (ja) * | 2015-01-26 | 2016-08-04 | 株式会社東芝 | 半導体装置 |
DE102015105085A1 (de) | 2015-04-01 | 2016-10-06 | Universität Paderborn | Verfahren zum Herstellen eines Siliziumcarbid-haltigen Körpers |
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JPH0672250B2 (ja) * | 1988-01-25 | 1994-09-14 | 株式会社鈴木商館 | 易可剥性レーザー光反射防止コーティング剤 |
JP3694768B2 (ja) * | 1999-04-27 | 2005-09-14 | 株式会社安川電機 | レーザマーキング方法 |
WO2005122223A1 (en) * | 2004-06-11 | 2005-12-22 | Showa Denko K.K. | Production method of compound semiconductor device wafer |
JP2006043717A (ja) * | 2004-08-02 | 2006-02-16 | Sumitomo Heavy Ind Ltd | マーキング方法、単結晶炭化ケイ素製部材の製造方法、及び単結晶炭化ケイ素製部材 |
JP4750720B2 (ja) * | 2004-12-08 | 2011-08-17 | 三星ダイヤモンド工業株式会社 | 被分割体における分割起点形成方法、被分割体の分割方法 |
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