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2008 Fiscal Year Annual Research Report

原料分子制御法によるAlNおよびAlGaN混晶の厚膜エピタキシャル成長

Planned Research

Project AreaOptoelectronics Frontier by Nitride Semiconductor -Ultimate Utilization of Nitride Semiconductor Material Potential-
Project/Area Number 18069004
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

纐纈 明伯  Tokyo University of Agriculture and Technology, 大学院・共生科学技術研究院, 教授 (10111626)

Co-Investigator(Kenkyū-buntansha) 熊谷 義直  東京農工大学, 大学院・共生科学技術研究院, 准教授 (20313306)
村上 尚  東京農工大学, 大学院・共生科学技術研究院, 助教 (90401455)
Keywords窒化物半導体 / 厚膜エピタキシー / 自立基板結晶 / Al系窒化物 / 原料分子制御法 / HVPE成長 / AIN / AIGaN
Research Abstract

窒化物半導体材料は深紫外領域から赤外領域までの広大なエネルギー領域をカバーする材料として、青紫色材料以外への応用に関しても世界的に注目されている。結晶品質そのものが新機能素子の実現や素子性能を決めてしまうと言っても過言ではない状況の中で、本研究では原料分子を制御した新しい気相成長法により窒化物半導体の高品質基板結晶の実現を目的として研究を進めている。具体的には、(1) 石英反応管と反応しないAl原料の利用、(2) 生成の自由エネルギー変化が大きく高温成長や高速成長が期待できるIn原料の利用により、高品質なAIN, InNおよびAIGaNの厚膜エピタキシャル成長を目的とした。
平成20年度の本研究分野の研究計画およびその成果について述べる
1. 高品質AINの厚膜成長を目指す
特に、成長温度、原料送入V/III比の確率を行うとともに、基板結晶からの剥離技術の確立を行った。
2. 均一なAIGaN三元混晶の厚膜成長を目指す
熱力学解析結果を元にして、AICl_3-GaCl系を用いた原料分子制御HVPE法により、気相-固相関係を明らかにするとともに、成長膜厚および析出組成の均一性が5%以内の均一成長に成功した
3. 熱力学解析成長シュミレーションによる最適な成長原料探索
Si汚染の少ない原料分子の探索を熱力学解析により行った
4. 成長装置の改良
より安定した成長を得るために、ヒータを購入し設置した。これにより、2インチで1500℃までの加熱が可能になった

  • Research Products

    (19 results)

All 2009 2008

All Journal Article (11 results) (of which Peer Reviewed: 11 results) Presentation (8 results)

  • [Journal Article] Polarity control and preparation of AIN nano-islands by hydride vapor phase epitaxy2009

    • Author(s)
      T. Nagashima, K. Hironaka, M. Ishizuki, Y. Kumagai, A. Koukitu, K. Takada
    • Journal Title

      Physica Status Solidi(c) (印刷中)

    • Peer Reviewed
  • [Journal Article] Self-Separation of a Thick AIN Layer from a Sapphire Substratevia Interfacial Voids Formed by the Decomposition of Sapphire2008

    • Author(s)
      Y. Kumagai, J. Tajima, M. Ishizuki, T. Nagashima, H. Murakami, K. Takada, A. Koukitu
    • Journal Title

      Applied Physics Express 1

      Pages: 045003-1-3

    • Peer Reviewed
  • [Journal Article] Influence of hydrogen input partial pressure on the polarity of InN on GaAs (111) A grown by metalorganic vapor phase epitaxy2008

    • Author(s)
      H. Murakami, J. Torii, H.-C. Cho, Y. Kumagai, A. Koukitu
    • Journal Title

      Journal of Crystal Growth 310

      Pages: 1602-1606

    • Peer Reviewed
  • [Journal Article] Ab initio calculation for the decomposition process of_GaN (0001) and (000-1) surfaces2008

    • Author(s)
      H. Suzuki, R. Togashi, H. Murakami, Kumagai, A. Koukitu
    • Journal Title

      Journal of Crystal Growth 310

      Pages: 1632-1636

    • Peer Reviewed
  • [Journal Article] In situ Gravimetric Monitoring of Decomposition Rate on Surface of (1012) R-Plane Sapphire for High-Temperature Growth of Nonpolar AIN2008

    • Author(s)
      K. Akiyama, H. Murakami, Y. Kumagai, A. Koukitu
    • Journal Title

      Japanese Journal of Applied Physics 47

      Pages: 3434-3437

    • Peer Reviewed
  • [Journal Article] Characterization of a freestanding AIN substrate prepared by hydride vapor phase epitaxy2008

    • Author(s)
      Y. Kumagai, T. Nagashima, H. Murakami, K. Takada, A. Koukitu
    • Journal Title

      Physica Status Solidi(c) 5

      Pages: 1512-1514

    • Peer Reviewed
  • [Journal Article] Growth of thin protective AIN layers on sapphire substrates at 1065℃ for hydride vapor phase epitaxy of AIN above 1300 ℃2008

    • Author(s)
      J. Tajima, Y. Kubota, R. Togashi, H. Murakami, Y. Kumagai, A. Koukitu
    • Journal Title

      Physica Status Solidi(c) 5

      Pages: 1515-1517

    • Peer Reviewed
  • [Journal Article] Experimental and ab-initio studies of temperature dependent InN decomposition in various ambient2008

    • Author(s)
      R. Togashi, T. Kamoshita, Y. Nishizawa, H. Murakami, Y. Kumagai, A. Koukitu
    • Journal Title

      Physica Status Solidi(c) 5

      Pages: 1518-1521

    • Peer Reviewed
  • [Journal Article] High-temperature growth of thick AIN layers on sapphire (0001) substrates by solid source halide vapor-phase epitaxy2008

    • Author(s)
      K. Eriguchi, T. Hiratsuka, H. Murakami, Y. Kumagai, A. Koukitu
    • Journal Title

      Journal of Crystal Growth 310

      Pages: 4016-4019

    • Peer Reviewed
  • [Journal Article] Improvements in the crystalline quality of MOVPE-InN layers by facet controlling with hydrogen partial pressure2008

    • Author(s)
      H. Murakami, H.-C. Cho, Y. Kumagai, A Koukitu
    • Journal Title

      Journal of Crystal Growth 310

      Pages: 4954-4958

    • Peer Reviewed
  • [Journal Article] First principles study of the decomposition processes of AIN in ahydrogen atmosphere2008

    • Author(s)
      U. Panyukova, H. Suzuki, R. Togashi, Murakami, Y. Kumagai, A. Koukitu
    • Journal Title

      Physica Status Solidi(c) 5

      Pages: 3042-3044

    • Peer Reviewed
  • [Presentation] Investigation of Polarity Dependent InN{0001} Decomposition in N_2 and H_2 Ambient2008

    • Author(s)
      R. Togashi, H. Adachi, T. Kamoshita, H. Murakami, Y. Kumagai, A. Koukitu
    • Organizer
      International Workshop on Nitride Semiconductors 20089
    • Place of Presentation
      Montreux, Switzerland
    • Year and Date
      2008-10-09
  • [Presentation] Progress in Preparation of Freestanding AIN Substrates by Hydride Vapor Phase Epitaxy2008

    • Author(s)
      Y. Kumagai, J. Tajima, Y Kubota, M. Ishizuki, R. Togashi, H. Murakami, T. Nagashima, K. Takada, A. Koukitu
    • Organizer
      International Workshop on Nitride Semiconductors 2008
    • Place of Presentation
      Montreux, Switzerland
    • Year and Date
      2008-10-08
  • [Presentation] Controlled Formation of Voids at the AIN and Sapphire Interface by the Sapphire Decomposition for Self-Separation of AIN Layers2008

    • Author(s)
      J. Tajima, Y. Kubota, M. Ishizuki, T. Nagashima, R. Togashi, H. Murakami, Y. Kumagai, K. Takada, A. Koukitu
    • Organizer
      International Workshop on Nitride Semiconductors 2008
    • Place of Presentation
      Montreux, Switzerland
    • Year and Date
      2008-10-07
  • [Presentation] Ab Initio Calculation for an Initial Growth Process of GaN on (0001) and (000-1) Surfaces by Vapor Phase2008

    • Author(s)
      H. Suzuki, R. Togashi, H. Murakami, Y. Kumagai, A. Koukitu
    • Organizer
      International Workshop on Nitride Semiconductors 2008
    • Place of Presentation
      Montreux, Switzerland
    • Year and Date
      2008-10-06
  • [Presentation] In situ gravimetric monitoring of surface reactions between sapphire and NH_<3>2008

    • Author(s)
      K. Akiyama, Y. Ishii, H. Murakami, Y., Kumagai, A. Koukitu
    • Organizer
      2nd International Symposium on Growth of III-Nitrides
    • Place of Presentation
      ラフォーレ修善寺, 伊豆, 静岡
    • Year and Date
      2008-07-08
  • [Presentation] Theoretical investigation on the decomposition process of GaN(0001) surface under a hydrogen atmosphere2008

    • Author(s)
      H. Suzuki, R. Togashi, H. Murakami, Y. Kumagai, A. Koukitu
    • Organizer
      2nd International Symposium on Growth of III-Nitrides
    • Place of Presentation
      ラフォーレ修善寺, 伊豆, 静岡
    • Year and Date
      2008-07-07
  • [Presentation] Preparation of a crack-free AIN template layer on sapphire substrate by hydride vapor phase epitaxy at 1450℃2008

    • Author(s)
      J. Tajima, H. Murakami, Y. Kumagai, K. Takada, A. Koukitu
    • Organizer
      2nd International Symposium on Growth of III-Nitrides
    • Place of Presentation
      ラフォーレ修善寺, 伊豆, 静岡
    • Year and Date
      2008-07-07
  • [Presentation] Improvements in crystalline quality of MOVPE-InN layers by facet controlling with hydrogen partial pressure2008

    • Author(s)
      H. Murakami, H.-C. Cho, Y. Kumagai, A. Koukitu
    • Organizer
      14th International Conference of Metalorganic Vapor Phase Epitaxy
    • Place of Presentation
      Metz, France
    • Year and Date
      2008-06-04

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Published: 2010-06-11   Modified: 2016-04-21  

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