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Effects of defects and surface structure on oxide film on non-polar 4H-SiC plane

Research Project

Project/Area Number 17K05049
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Crystal engineering
Research InstitutionJapan Fine Ceramics Center

Principal Investigator

Yukari Ishikawa  一般財団法人ファインセラミックスセンター, その他部局等, 主席研究員 (60416196)

Co-Investigator(Kenkyū-buntansha) 菅原 義弘  一般財団法人ファインセラミックスセンター, その他部局等, 上級研究員 (70466291)
姚 永昭  一般財団法人ファインセラミックスセンター, その他部局等, 上級研究員 (80523935)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords4H-SiC / 非極性面 / 転位 / CL / 積層欠陥 / M面 / 基底面転位 / 部分転位 / GaN / EBIC / TEM / 拡張 / 結晶工学 / 半導体
Outline of Final Research Achievements

We observed the generation and expansion of single Shockley stacking faults which cause the forward voltage drift in 4H-SiC PiN diode from basal plane dislocations in a 4H-SiC from the non-polar plane under electron beam irradiation. We found that 1) not only direct excitation but also indirect excitation which provide electron-hole can generate and expand stacking fault from basal plane dislocation, 2) indirect excitation of partial dislocation is more effective than direct excitation of stacking fault for expand stacking fault and 3) C-core partial dislocation become mobile after supplying a threshold number of electron-hole pairs.

Academic Significance and Societal Importance of the Research Achievements

SiCパワーデバイスの順方向ドリフトの原因となる積層欠陥の生成メカニズムに関して新たな知見を得た。これは、電気自動車、電力変換、電車等社会インフラに必要な電力変換素子の信頼性、性能維持に必要な情報となる。また、学術的には光や電子線の照射によって転位が可動化するメカニズムに新たな知見を加えるものである。転位はデバイスだけではなく材料の力学的特性を決めるものであり、光・放射線照射下(宇宙・原子炉等の加工環境下)での材料物性の変化の予測、解明に役立つことが期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (11 results)

All 2020 2019 2018 2017

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Observation of dislocations in β-Ga2O3 single-crystal substrates by synchrotron X-ray topography, chemical etching, and transmission electron microscopy2020

    • Author(s)
      Yongzhao Yao, Yoshihiro Sugawara and Yukari Ishikawa
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: 4 Pages: 045502-045502

    • DOI

      10.35848/1347-4065/ab7dda

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] X-ray diffraction and Raman characterization of β-Ga2O3 single crystal grown by edge-defined film-fed growth method2019

    • Author(s)
      Yao, Yongzhao, Sugawara, Yoshihiro, Yukari, Ishikawa,Takahashi, Yumiko, Hirano, Keiichi
    • Journal Title

      Journal of Applied Physics

      Volume: 126 Issue: 20 Pages: 205110-205110

    • DOI

      10.1063/5.0007229

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Expansion of Basal Plane Dislocation in 4H-SiC Epitaxial Layer on A-Plane by Electron Beam Irradiation2018

    • Author(s)
      Masaki Sudo, Yukari Ishikawa, Yongzhao Yao, Yoshihiro Sugawara, and Masashi Kato
    • Journal Title

      Materials Science Forum

      Volume: 924 Pages: 151-154

    • DOI

      10.4028/www.scientific.net/msf.924.151

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Expansion of a single Shockley stacking fault in a 4H-SiC (11-20) epitaxial layer caused by electron beam irradiation2018

    • Author(s)
      Yukari Ishikawa, Masaki Sudo, Yongzhao Yao, Yoshihiro Sugawara, and Masashi Kato
    • Journal Title

      Journal of Applied Physics

      Volume: 123 Issue: 22 Pages: 1-6

    • DOI

      10.1063/1.5026448

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] HVPE-GaN基板上に形成したビッカース圧痕周囲の転位構造2020

    • Author(s)
      石川 由加里、菅原 義弘、横江 大作、姚 永昭
    • Organizer
      2020年第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Synchrotron X-Ray Topography Observation and Classification of Dislocations in β-Ga2O3 single crystal substrates grown by edge-defined film-fed growth2019

    • Author(s)
      Yao, Yongzhao, Sugawara, Yoshihiro, Yukari, Ishikawa,Takahashi, Yumiko, Hirano, Keiichi
    • Organizer
      Yao, Yongzhao, Sugawara, Yoshihiro, Yukari, Ishikawa,Takahashi, Yumiko, Hirano, Keiichi
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation and classification of defects in gallium oxide2019

    • Author(s)
      Yao, Yongzhao
    • Organizer
      International Workshop on Gallium Oxide and Related Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 4H-SiC, GaNの基底面転位のm面電子線照射による挙動2019

    • Author(s)
      石川由加里,須藤正喜,菅原義弘,姚永昭,加藤正史、三好実人、江川孝志
    • Organizer
      2019年第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 4H-SiCのA面における基底面転位の電子線照射による拡張挙動2017

    • Author(s)
      石川由加里,須藤正喜,姚永昭,菅原義弘,加藤正史
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] 4H-SiC A面電子線励起による基底面転位の拡張挙動2017

    • Author(s)
      石川由加里,須藤正喜,姚永昭,菅原義弘,加藤正史
    • Organizer
      先進パワー半導体分科会 第4回講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Expansion of basal plane dislocation in 4H-SiC epitaxial layer on A-plane by electron beam irradiation2017

    • Author(s)
      Masaki Sudo, Yukari Ishikawa, Yong-Zhao Yao, Yoshihiro Sugawara, and Masashi Kato
    • Organizer
      2017 International Conference on Silicon Carbide and Related Materials
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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