顔写真

PHOTO

Daisetsu Toh
藤 大雪
Daisetsu Toh
藤 大雪
Graduate School of Engineering Division of Precision Science & Technology and Applied Physics, Assistant Professor

Research History 1

  1. 2021/04 - Present
    大阪大学大学院工学研究科 物理学系専攻 助教

Education 1

  1. 大阪大学大学院 工学研究科 精密科学・応用物理学専攻

    2018/04 - 2021/03

Committee Memberships 2

  1. 公益社団法人精密工学会 広報・情報部会 広報委員 Academic society

    2025/04 - Present

  2. 公益社団法人 精密工学会 若手先導的会員(精密学会アフィリエイト)

    2023/03 - Present

Research Areas 1

  1. Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Manufacturing and production engineering / chemical polishing

Awards 5

  1. JSPE Best Paper Award

    2025/03

  2. アドバンスト・ベストプレゼンテーション賞(2023年度精密工学会秋季大会学術講演会)

    精密工学会 2023/11

  3. 精密工学会技術奨励賞

    精密工学会 2022/09

  4. アドバンスト・ベストプレゼンテーション賞(2021年度精密工学会秋季大会学術講演会)

    精密工学会 2021/09

  5. ベストプレゼンテーション賞

    2015年度精密工学会秋季大会学術講演会 2015/09

Papers 33

  1. Fabrication of YAG ceramics surface without damage and grain boundary steps using catalyzed chemical wet etching

    Daisetsu Toh, Kiyoto Kayao, Kazuto Yamauchi, Yasuhisa Sano

    CIRP Journal of Manufacturing Science and Technology Vol. 47 p. 1-6 2023/12 Research paper (scientific journal)

    Publisher: Elsevier BV
  2. Dicing Process for 4H-SiC Wafers by Plasma Etching Using High-Pressure SF<sub>6</sub> Plasma with Metal Masks

    Yasuhisa Sano, Yuma Nakanishi, Masaaki Oshima, Shunto Iden, Jumpei Yamada, Daisetsu Toh, Kazuto Yamauchi

    Materials Science Forum Vol. 1124 p. 51-55 2024/08/21 Research paper (scientific journal)

    Publisher: Trans Tech Publications, Ltd.
  3. Ultra-precision smooth surface on polymer material prepared by catalyst-referred etching

    D. Toh, K. Takeda, K. Kayao, Y. Ohkubo, K. Yamauchi, Y. Sano

    International Journal of Automation Technology Vol. 18 No. 2 p. 240-247 2024/03/05 Research paper (scientific journal)

  4. High-pressure plasma etching up to 9 atm toward uniform processing inside narrow grooves of high-precision X-ray crystal optics

    Shotaro Matsumura, Iori Ogasahara, Masafumi Miyake, Taito Osaka, Daisetsu Toh, Jumpei Yamada, Makina YABASHI, Kazuto Yamauchi, Yasuhisa Sano

    Applied Physics Express 2023/12/02 Research paper (scientific journal)

    Publisher: IOP Publishing
  5. Catalyst enhancement approach for improving the removal rate and stability of silica glass polishing via catalyzed chemical etching in pure water

    Daisetsu Toh, Kiyoto Kayao, Pho Van Bui, Kouji Inagaki, Yoshitada Morikawa, Kazuto Yamauchi, Yasuhisa Sano

    Precision Engineering Vol. 84 p. 21-27 2023/11 Research paper (scientific journal)

    Publisher: Elsevier BV
  6. Bias-assisted photoelectrochemical planarization of GaN (0001) with impurity concentration distribution

    D. Toh, K. Kayao, R. Ohnishi, A. I. Osaka, K. Yamauchi, Y. Sano

    AIP Advances Vol. 13 No. 9 2023/09/01 Research paper (scientific journal)

    Publisher: AIP Publishing
  7. Role of Photoelectrochemical Oxidation in Enabling High-Efficiency Polishing of Gallium Nitride

    Kiyoto Kayao, Daisetsu Toh, Kazuto Yamauchi, Yasuhisa Sano

    ECS Journal of Solid State Science and Technology Vol. 12 No. 6 p. 063005-063005 2023/06/01 Research paper (scientific journal)

    Publisher: The Electrochemical Society
  8. High-Speed Plasma Etching of Gallium Oxide Substrates Using Atmospheric-Pressure Plasma with Hydrogen-Helium Mixed Gas

    Yasuhisa Sano, Taiki Sai, Genta Nakaue, Daisetsu Toh, Kazuto Yamauchi

    Solid State Phenomena Vol. 342 p. 69-72 2023/05/25 Research paper (scientific journal)

    Publisher: Trans Tech Publications, Ltd.
  9. High-speed etching of gallium nitride substrate using hydrogen-contained atmospheric-pressure plasma

    Yasuhisa Sano, Genta Nakaue, Daisetsu Toh, Jumpei Yamada, Kazuto Yamauchi

    Applied Physics Express Vol. 16 No. 4 p. 045504-045504 2023/04/01 Research paper (scientific journal)

    Publisher: IOP Publishing
  10. High-throughput deterministic plasma etching using array-type plasma generator system

    Yasuhisa Sano, Ken Nishida, Ryohei Asada, Shinya Okayama, Daisetsu Toh, Satoshi Matsuyama, Kazuto Yamauchi

    Review of Scientific Instruments Vol. 92 No. 12 p. 125107-125107 2021/12/01 Research paper (scientific journal)

    Publisher: AIP Publishing
  11. Nondeteriorating Verwey Transition in 50 nm Thick Fe<inf>3</inf>O<inf>4</inf>Films by Virtue of Atomically Flattened MgO Substrates: Implications for Magnetoresistive Devices

    Ai I. Osaka, Daisetsu Toh, Kazuto Yamauchi, Ken Hattori, Xiaoqian Shi, Fangzhun Guo, Hidekazu Tanaka, Azusa N. Hattori

    ACS Applied Nano Materials Vol. 4 No. 11 p. 12091-12097 2021/11/26 Research paper (scientific journal)

  12. Photoelectrochemical oxidation assisted catalyst-referred etching for sic (0001) surface

    Daisetsu Toh, Pho Van Bui, Kazuto Yamauchi, Yasuhisa Sano

    International Journal of Automation Technology Vol. 15 No. 1 p. 74-79 2021 Research paper (scientific journal)

  13. High surface laser-induced damage threshold of SrB<inf>4</inf>O<inf>7</inf>single crystals under 266-nm (DUV) laser irradiation

    Yasunori Tanaka, Ryota Murai, Yoshinori Takahashi, Tsuyoshi Sugita, Daisetsu Toh, Kazuto Yamauchi, Sora Aikawa, Haruki Marui, Yuji Umeda, Yusuke Funamoto, Tomosumi Kamimura, Melvin John F. Empizo, Masayuki Imanishi, Yusuke Mori, Masashi Yoshimura

    Optics Express Vol. 28 No. 20 p. 29239-29244 2020/09 Research paper (scientific journal)

  14. An abrasive-free chemical polishing method assisted by nickel catalyst generated by in situ electrochemical plating

    Daisetsu Toh, Pho Van Bui, Ai Isohashi, Satoshi Matsuyama, Kazuto Yamauchi, Yasuhisa Sano

    Review of Scientific Instruments Vol. 91 No. 4 2020/04 Research paper (scientific journal)

  15. Atomically smooth Si surface planarized using a thin film catalyst in pure water

    Pho van Bui, Daisetsu Toh, Shinsaku Shiroma, Taku Hagiwara, Ai Isohashi Osaka, Satoshi Matsuyama, Yasuhisa Sano, Kazuto Yamauchi

    Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2020 p. 43-44 2020 Research paper (international conference proceedings)

  16. Catalyzed chemical polishing of SiO <inf>2</inf> glasses in pure water

    Daisetsu Toh, Pho Van Bui, Ai Isohashi, Naotaka Kidani, Satoshi Matsuyama, Yasuhisa Sano, Yoshitada Morikawa, Kazuto Yamauchi

    Review of Scientific Instruments Vol. 90 No. 4 2019/04 Research paper (scientific journal)

  17. High-efficiency SiC polishing using a thin film catalyst in pure water

    Pho Van Bui, Daisetsu Toh, Satoshi Matsuyama, Yasuhisa Sano, Kazuto Yamauchi

    European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019 p. 50-51 2019 Research paper (international conference proceedings)

  18. High-efficiency planarization of SIC wafers by water-CARE (Catalyst-referred etching) employing photoelectrochemical oxidation

    H. Kida, D. Toh, P. V. Bui, A. Isohashi, R. Ohnishi, S. Matsuyama, K. Yamauchi, Y. Sano

    Materials Science Forum Vol. 963 MSF p. 525-529 2019 Research paper (international conference proceedings)

  19. Development of an abrasive-free polishing method for optical material using pure water and Ni catalyst

    Daisetsu Toh, Ryosuke Ohnishi, Pho V. Bui, Ai Isohsahi, Satoshi Matsuyama, Yasuhisa Sano, Kazuto Yamauchi

    Proceedings - 34th ASPE Annual Meeting p. 474-477 2019 Research paper (international conference proceedings)

  20. High-efficiency planarization of GaN wafer by catalyst-referred etching with positive-biased photo-electrochemical oxidation

    Ryosuke Ohnishi, Daisetsu Toh, Satoshi Matsuyama, Ai Isohashi, Yasuhisa Sano, Kazuto Yamauchi

    Proceedings - 34th ASPE Annual Meeting p. 79-83 2019 Research paper (international conference proceedings)

  21. Platinum-catalyzed hydrolysis etching of SiC in water: A density functional theory study

    Pho Van Bui, Daisetsu Toh, Ai Isohashi, Satoshi Matsuyama, Kouji Inagaki, Yasuhisa Sano, Kazuto Yamauchi, Yoshitada Morikawa

    Japanese Journal of Applied Physics Vol. 57 No. 5 2018/05 Research paper (scientific journal)

  22. High-efficiency planarization of SiC in pure water using a thin film catalyst

    Pho Van Bui, Yuta Nakahira, Daisetsu Toh, Satoshi Matsuyama, Yasuhisa Sano, Kazuto Yamauchi

    European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 18th International Conference and Exhibition, EUSPEN 2018 p. 433-434 2018 Research paper (international conference proceedings)

  23. Development of high efficiency polishing method using pure water and Ni catalyst

    Daisetsu Toh, Pho Van Bui, Nakahira Yuta, Hideka Kida, Takahisa Ohgushi, Satoshi Matsuyama, Yasuhisa Sano, Kazuto Yamauchi

    European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 18th International Conference and Exhibition, EUSPEN 2018 p. 435-436 2018 Research paper (international conference proceedings)

  24. Chemical etching of silicon carbide in pure water by using platinum catalyst

    Ai Isohashi, P. V. Bui, D. Toh, S. Matsuyama, Y. Sano, K. Inagaki, Y. Morikawa, K. Yamauchi

    Applied Physics Letters Vol. 110 No. 20 2017/05/15 Research paper (scientific journal)

  25. ニッケル触媒を利用した純水ベースの触媒表面基準エッチング法の開発

    藤 大雪, 礒橋 藍, 稻田 辰昭, 中平 雄太, 木田 英香, 松山 智至, 佐野 泰久, 山内 和人

    精密工学会学術講演会講演論文集 Vol. 2017 No. 0 p. 35-36 2017

    Publisher: 公益社団法人 精密工学会
  26. 触媒表面基準エッチング法における水素水を用いた被毒除去法の提案

    中平 雄太, 礒橋 藍, Bui Pho, 稻田 辰昭, 藤 大雪, 木田 英香, 松山 智至, 佐野 泰久, 山内 和人

    精密工学会学術講演会講演論文集 Vol. 2017 No. 0 p. 1-2 2017

    Publisher: 公益社団法人 精密工学会
  27. Planarization of SiC and oxide surfaces by using Catalyst-Referred Etching with water

    Pho Van Bui, Ai Isohashi, Daisetsu Toh, Satoshi Matsuyama, Kouji Inagaki, Yasuhisa Sano, Kazuto Yamauchi

    Proceedings of the 17th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2017 p. 157-158 2017 Research paper (international conference proceedings)

  28. Stabilization of removal rate of silica glass on catalyst-referred etching by cleaning catalyst surface

    Yuta Nakahira, Ai Isohashi, Tatsuaki Inada, Daisetsu Toh, Hideka Kida, Satoshi Matsuyama, Yasuhisa Sano, Kazuto Yamauchi

    ICPT 2017 - International Conference on Planarization/CMP Technology p. 110-114 2017 Research paper (international conference proceedings)

  29. Stabilization method of transition metal catalyst for high efficiency catalyst-referred etching (CARE) of silicon carbide

    Daisetsu Toh, Ai Isohashi, Tatuaki Inada, Yuta Nakahira, Hideka Kida, Satoshi Matuyama, Yasuhisa Sano, Kazuto Yamauchi

    ICPT 2017 - International Conference on Planarization/CMP Technology p. 106-109 2017 Research paper (international conference proceedings)

  30. Improvement of removal rate in catalyst-referred etching of GaN substrates

    INADA Tatsuaki, ISOHASHI Ai, TOH Daisetsu, NAKAHIRA Yuta, MATSUYAMA Satoshi, SANO Yasuhisa, YAMAUCHI Kazuto

    The Proceedings of Mechanical Engineering Congress, Japan Vol. 2016 No. 0 2016

    Publisher: The Japan Society of Mechanical Engineers
  31. 触媒表面基準エッチング法における被毒物除去による加工速度安定化手法の開発

    中平 雄太, 礒橋 藍, Bui Pho, 稻田 辰昭, 藤 大雪, 松山 智至, 佐野 泰久, 山内 和人

    精密工学会学術講演会講演論文集 Vol. 2016 No. 0 p. 211-212 2016

    Publisher: 公益社団法人 精密工学会
  32. Investigation of catalytic metals for a catalyst referred etching in pure water

    Ai Isohashi, Tatsuaki Inada, Daisetsu Toh, Yuta Nakahira, Takahito Sugiura, Naotaka Kidani, Koji Inagaki, Yasihisa Sano, Satoshi Matsuyama, Kazuto Yamauchi

    Proceedings of the 16th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2016 2016 Research paper (international conference proceedings)

  33. 触媒表面基準エッチング法における触媒機能活性化手法の開発

    藤 大雪, 礒橋 藍, 稻田 辰昭, 中平 雄太, 松山 智至, 佐野 泰久, 山内 和人

    精密工学会学術講演会講演論文集 Vol. 2015 p. 447-448 2015

    Publisher: 公益社団法人 精密工学会

Misc. 15

  1. 大気圧プラズマによる表面処理を利用した常温接合技術の開発

    櫛川新太, 西岡柚香, 藤大雪, 山内和人, 佐野泰久

    精密工学会関西地方定期学術講演会講演論文集 Vol. 2022 2022

  2. 水素ガスを用いた大気圧プラズマによる窒化ガリウム基板の高能率エッチング

    中上元太, 崔泰樹, 藤大雪, 山内和人, 佐野泰久

    精密工学会関西地方定期学術講演会講演論文集 Vol. 2022 2022

  3. 紫外光照射を援用した触媒表面基準エッチング法を用いた窒化ガリウム基板の高能率平滑化

    萱尾澄人, 藤大雪, 山田純平, 山内和人, 佐野泰久

    精密工学会関西地方定期学術講演会講演論文集 Vol. 2022 2022

  4. Fabrication of atomically smooth polycrystalline surface without grain boundary steps by using catalyst referred etching method

    Toh Daisetsu, Bui Van Pho, Matsuyama Satoshi, Sano Yasuhisa, Yamauchi Kazuto

    Proceedings of JSPE Semestrial Meeting Vol. 2021A p. 115-116 2021/09/08

    Publisher: The Japan Society for Precision Engineering
  5. 触媒表面基準エッチング法を用いた高分子材料表面の高精度平坦化手法-ポリカーボネートの加工特性評価-

    竹田広大, 藤大雪, 佐野泰久, 山内和人

    精密工学会関西地方定期学術講演会講演論文集 Vol. 2021 2021

  6. SF6ガスを用いたサブ大気圧プラズマによるSiC-MOSFETの裏面薄化におけるデバイス性能への影響の調査

    大島政明, 中西悠真, 藤大雪, 松山智至, 山内和人, 佐野泰久

    精密工学会関西地方定期学術講演会講演論文集 Vol. 2021 2021

  7. 触媒表面基準エッチング法におけるシリコンの除去機構の解明

    板垣果歩, 萩原拓, 萱尾清人, VAN PHO Bui, 藤大雪, 佐野泰久, 山内和人

    精密工学会関西地方定期学術講演会講演論文集 Vol. 2021 2021

  8. Improvement of Metal-Insulator Phase Transition in Ultra-thin Fe3O4 Film Grown on MgO Substrate Flattened by Catalyst-referred Etching

    Osaka Ai, Toh Daisetsu, Yamauchi Kazuto, Sano Yasuhisa, Tanaka Hidekazu, Hattori Azusa

    Proceedings of JSPE Semestrial Meeting Vol. 2020A p. 187-188 2020/08/20

    Publisher: The Japan Society for Precision Engineering
  9. Ultra-thin Film Grown of High Quality Fe3O4 on MgO Substrate Flattened by Catalyst-referred Etching

    Osaka Ai, Toh Daisetsu, Yamauchi Kazuto, Sano Yasuhisa, Tanaka Hidekazu, Hattori Azusa

    Proceedings of JSPE Semestrial Meeting Vol. 2020S p. 662-663 2020/03/01

    Publisher: The Japan Society for Precision Engineering
  10. Metal-insulator phase transition in ultra-thin Fe3O4 film grown on MgO substrate flattened by catalyst-referred etching

    Osaka Ai I., Hattori Azusa N., Tanaka Hidekazu, Toh Daisetsu, Yamauchi Kazuto, Sano Yasuhisa

    Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science Vol. 2020 2020

    Publisher: The Japan Society of Vacuum and Surface Science
  11. 触媒表面電位制御を取り入れた光電気化学触媒表面基準エッチング法によるSiC基板の高能率平坦化加工

    大西 諒典, 木田 英香, 藤 大雪, 松山 智至, 佐野 泰久, 山内 和人

    精密工学会学術講演会講演論文集 Vol. 2019A p. 28-29 2019/08/20

    Publisher: 公益社団法人 精密工学会
  12. High-efficiency planarization of GaN by catalyst-referred etching using photo-electrochemical oxidation

    KIDA Hideka, TOH Daisetsu, OHNISHI Ryosuke, Matsuyama Tomohisa, Sano Yasuhisa, Yamauchi Kazuto

    The Proceedings of Mechanical Engineering Congress, Japan Vol. 2018 2018

    Publisher: The Japan Society of Mechanical Engineers
  13. 光電気化学酸化を援用した触媒表面基準エッチング法による窒化ガリウムの高能率平坦化

    木田 英香, 藤 大雪, 中平 雄太, 松山 智至, 佐野 泰久, 山内 和人

    精密工学会学術講演会講演論文集 Vol. 2017A p. 19-20 2017

    Publisher: 公益社団法人 精密工学会
  14. Platinum-assisted chemical etching of SiC: A density functional theory study

    Bui Pho Van, Toh Daisetsu, Inagaki Kouji, Sano Yasuhisa, Yamauchi Kazuto, Morikawa Yoshitada

    Proceedings of JSPE Semestrial Meeting Vol. 2017A p. 251-252 2017

    Publisher: The Japan Society for Precision Engineering
  15. GaN表面CARE加工の反応メカニズムの第一原理計算による解析 II-表面キンクサイト周辺のH2O終端構造-

    稲垣耕司, BUI Pho Van, 礒橋藍, 藤大雪, 森川良忠, 山内和人

    応用物理学会春季学術講演会講演予稿集(CD-ROM) Vol. 63rd 2016

Publications 6

  1. 触媒表面基準エッチング法によるSiC,GaN基板表面の原子レベル平坦化

    (株)技術情報協会 月刊車載テクノロジー・12巻10号 pp.19-23 2025/07/30

  2. 触媒表面基準エッチング法を用いた高分子材料の高精度平滑化

    藤大雪, 萱尾澄人, 山内和人, 佐野泰久

    一般社団法人 日本トライボロジー学会・70巻 5号 pp. 289-294 2025/05

  3. 触媒表面基準エッチング法を利用した機能材料表面の原子スケール平滑化

    藤大雪, 山内和人, 佐野泰久

    一般社団法人 表面技術協会 表面技術・76巻4号 pp. 160-164 2025/04

  4. 超純水を利用した半導体基板の最終表面仕上げ技術

    日本工業出版 クリーンテクノロジー 2024年12月号 2024/12

  5. 金属薄膜と超純水を利用した超精密研磨手法の開発

    一般社団法人 生産技術振興協会 生産と技術 Vol.75, No.2 (2023) pp. 106-109 2023

  6. 光電気化学反応を利用した環境調和性に優れた高能率GaN表面研磨技術

    萱尾澄人,山内和人,佐野泰久

    日本工業出版 光アライアンス 2024年5月号

Presentations 1

  1. Fabrication of damage-free atomically smooth SiC surface using water and Ni catalyst

    D. Toh, R. Ohnishi, P. V. Bui, A. Isohashi, S. Matsuyama, Y. Sano, K. Yamauchi

    The International Conference on Silicon Carbide and Related Materials 2019 2019/10/04

Industrial Property Rights 3

  1. 触媒表面基準エッチング方法及びその装置

    山内 和人, 藤 大雪

    特許第6797409号

    出願日:2017/01/12

    登録日:2020/11/20

  2. 触媒パッド及びその製造方法

    佐野 泰久, 藤 大雪, 山内 和人, 二村 浩平, 吉田 祐介

    出願日:2023/08/28

  3. 触媒表面基準エッチング方法及びその装置

    山内 和人, 藤 大雪

    出願日:2017/01/12

Institutional Repository 5

Content Published in the University of Osaka Institutional Repository (OUKA)
  1. High-throughput deterministic plasma etching using array-type plasma generator system

    Sano Yasuhisa, Nishida Ken, Asada Ryohei, Okayama Shinya, Toh Daisetsu, Matsuyama Satoshi, Yamauchi Kazuto

    Review of Scientific Instruments Vol. 92 No. 12 2021/12/16

  2. Photoelectrochemical oxidation assisted catalyst-referred etching for sic (0001) surface

    Toh Daisetsu, Bui Pho Van, Yamauchi Kazuto, Sano Yasuhisa

    International Journal of Automation Technology Vol. 15 No. 1 p. 74-79 2021/01/05

  3. An abrasive-free chemical polishing method assisted by nickel catalyst generated by in situ electrochemical plating

    Toh Daisetsu, Van Bui Pho, Isohashi Ai, Matsuyama Satoshi, Yamauchi Kazuto, Sano Yasuhisa

    Review of Scientific Instruments Vol. 91 No. 4 2020/04/13

  4. Catalyzed chemical polishing of SiO2 glasses in pure water

    Toh Daisetsu, Bui Pho Van, Isohashi Ai, Kidani Naotaka, Matsuyama Satoshi, Sano Yasuhisa, Morikawa Yoshitada, Yamauchi Kazuto

    Review of Scientific Instruments Vol. 90 No. 4 2019/04/15

  5. 触媒表面基準エッチング法における材料除去機構の解明と各種機能性材料への応用

    藤 大雪