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Reduction of contact resistance and demonstration of nitrogen-polar AlN field-effect transistors

Research Project

Project/Area Number 17K14110
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Crystal engineering
Research InstitutionUniversity of Tsukuba

Principal Investigator

Hironori Okumura  筑波大学, 数理物質系, 助教 (80756750)

Research Collaborator UEDONO Akira  筑波大学, 数理物質系, 教授
Oshima Takayoshi  佐賀大学, 理工学部, 准教授
Palacios Tomas  MIT大学, Electrical engineering and Computer Science, 教授
Suihkonen Sami  Aalto大学, Electronics and Nanoengineering, Scientist
Kakanakova Anelia  Linkoping大学, Physics Chemistry and Biology, 准教授
Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywordsパワーデバイス / 窒化物半導体 / 結晶成長 / 窒素極性面 / 電界効果トランジスタ / 有機金属気相成長 / 接触抵抗 / 酸化物半導体 / 分極効果トランジスタ / エッチング / 高温デバイス / イオン注入 / 不純物拡散 / 有機金属気相成長法 / 高温成長 / 結晶品質 / 電子・電気材料 / 半導体物性 / 電子デバイス・機器 / 結晶工学 / エピタキシャル
Outline of Final Research Achievements

In this work, we aimed to develop Aluminum-nitride (AlN) based electrical devices, which have attracted much attention for high-frequency and high-power applications. AlN-based devices have suffered from the high contact resistances and low carrier concentrations because of the large band-gap of AlN (6.1 eV). To solve these issues, we challenged to fabricate the new structure of nitrogen-polar AlN polarization field-effect transistors (POLFETs).
(i) High crystalline-quality AlN films with a nitrogen-polar orientation were grown by metal-organic vapor-phase deposition system.
(ii) We firstly achieved the demonstration of nitrogen-polar FETs by controlling the unintentionally doped impurities.

Academic Significance and Societal Importance of the Research Achievements

本研究は、AlNの物性を活かした高耐圧素子の実現を目指す、実用的な研究である。時には絶縁体にも分類される、超ワイドバンドギャップ半導体のAlNを用いた素子を作製することは、半導体物性の物理限界を知る研究になり、学術的に大きな意義がある。本研究により、高性能AlNトランジスタを実現できたことで、新しい高耐圧素子用材料の分野開拓および普及に大きく貢献できると期待する。

Report

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

    (18 results)

All 2019 2018 2017 Other

All Int'l Joint Research (4 results) Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 6 results) Presentation (8 results) (of which Int'l Joint Research: 8 results)

  • [Int'l Joint Research] Aalto University(Finland)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] MIT(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] EPFL(Switzerland)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Linkoping University(Sweden)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Fabrication of an AlN ridge structure using inductively coupled Cl2/BCl3 plasma and a TMAH solution2019

    • Author(s)
      Okumura Hironori
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: 2 Pages: 026502-026502

    • DOI

      10.7567/1347-4065/aaf78b

    • NAID

      210000135293

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Demonstration of lateral field-effect transistors using Sn-doped β-(AlGa)2O3 (010)2019

    • Author(s)
      Okumura Hironori、Kato Yuji、Oshima Takayoshi、Palacios Tomas
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SB Pages: SBBD12-SBBD12

    • DOI

      10.7567/1347-4065/ab002b

    • NAID

      210000135426

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] N-polar AlN buffer growth by metal organic vapor phase epitaxy for transistor applications2018

    • Author(s)
      Lemettinen Jori、Okumura Hironori、Palacios Tomas、Suihkonen Sami
    • Journal Title

      Applied Physics Express

      Volume: 11 Issue: 10 Pages: 101002-101002

    • DOI

      10.7567/apex.11.101002

    • NAID

      210000136358

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] MOVPE growth of nitrogen- and aluminum-polar AlN on 4H-SiC2018

    • Author(s)
      J. Lemettinen、H. Okumura、I. Kim、M. Rudzinski、J. Grzonka、T. Palacios、S. Suihkonen
    • Journal Title

      Journal of Crystal Growth

      Volume: 487 Pages: 50-56

    • DOI

      10.1016/j.jcrysgro.2018.02.020

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] MOVPE growth of N-polar AlN on 4H-SiC: Effect of substrate miscut on layer quality2018

    • Author(s)
      J. Lemettinen、H. Okumura、I. Kim、C. Kauppinen、T. Palacios、S. Suihkonen
    • Journal Title

      Journal of Crystal Growth

      Volume: 487 Pages: 12-16

    • DOI

      10.1016/j.jcrysgro.2018.02.013

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] AlN metal-semiconductor field-effect transistors using Si-ion implantation2018

    • Author(s)
      H. Okumura、S. Suihkonen、J. Lemettinen、A. Uedono、Y. Zhang、D. Piedra、T. Palacios
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 4S Pages: 04FR11-04FR11

    • DOI

      10.7567/jjap.57.04fr11

    • NAID

      210000149017

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Nitrogen-face AlN-based field-effect transistors2018

    • Author(s)
      Hironori Okumura, Jori Lemettinen, Sami Suihkonen, Tomas Palacios
    • Organizer
      Compound Semiconductor Week 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of beta-(AlGa) 2 O 3 (010) metal-semiconductor field-effect transistors with high breakdown voltage over 900 V2018

    • Author(s)
      Hironori Okumura, Yuji Kato,Takayoshi Oshima, Tomas Palacios
    • Organizer
      2018 International Conference on Solid State Devices and Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of Nitrogen-face AlN-based polarization field-effect transistors2018

    • Author(s)
      Hironori Okumura, Jori Lemettinen, Sami Suihkonen, Tomas Palacios
    • Organizer
      The International Workshop on Nitride Semiconductors 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AlN-channel metal-semiconductor field-effect transistors2018

    • Author(s)
      H. Okumura, S. Suihkonen, J. Lemettinen, A. Uedono, and T. Palacios
    • Organizer
      MARC 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] AlN metal-semiconductor field-effect transistors using Si-ion implantation2017

    • Author(s)
      H. Okumura, S. Suihkonen, J. Lemettinen, A. Uedono, T. Palacios,
    • Organizer
      2017 Material Research Society Fall meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] AlN metal-semiconductor field-effect transistors using Si-ion implantation2017

    • Author(s)
      H. Okumura, S. Suihkonen, J. Lemettinen, A. Uedono, and T. Palacios
    • Organizer
      2017 International Conference on Solid State Devices and Materials
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Electrical Properties of Si-Ion Implanted AlN2017

    • Author(s)
      H. Okumura, S. Suihkonen, and T. Palacios
    • Organizer
      12th Int. Conf. Nitride Semiconductors
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] MOVPE growth of nitrogen-polar AlN on C-face 4H-SiC with miscut2017

    • Author(s)
      J. Lemettinen, H. Okumura, T. Palacios, and S. Suihkonen
    • Organizer
      12th Int. Conf. Nitride Semiconductors
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2022-02-21  

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