• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2013 Fiscal Year Annual Research Report

次世代高性能ディスプレイの実現に向けた低温多結晶シリコン薄膜トランジスタ

Research Project

Project/Area Number 23360137
Research InstitutionNara Institute of Science and Technology

Principal Investigator

浦岡 行治  奈良先端科学技術大学院大学, 物質創成科学研究科, 教授 (20314536)

Project Period (FY) 2011-04-01 – 2014-03-31
Keywordsシリコン薄膜 / レーザー照射 / 水中レーザ / 結晶化 / 薄膜トランジスタ / 結晶粒 / 欠陥 / 水素化
Research Abstract

薄膜トランジスタ(TFT)はディスプレイを駆動するデバイス素子である.本研究では,poly-Si TFTを200°C以下の超低温で作製する技術として,水中で試料へレーザー照射を行う「水中レーザーアニール(WLA)」を提案した.WLAでは水による冷却効果とSi膜中温度の均一化効果を利用する.これらによって,基板温度上昇を抑制しつつ高品質なpoly-Si膜の形成が期待できる.また,WLAでは試料表面が水蒸気に暴露される為,水素による電気的欠陥の終端効果が期待できる.
WLAおよび従来結晶化で用いられる大気中レーザーアニール(LA)にて形成したガラス基板上poly-Si薄膜の粒径サイズを調査した.LAと比較してWLAでは大粒径かつ均一な結晶粒,すなわち高品質poly-Si膜が形成されていた.次にWLAによりpolyethylene terephtalate(PET) 膜上の非晶質Si(a-Si)薄膜を結晶化させた.ラマン分光測定により評価したWLA poly-Si膜の結晶化率とピーク波数を調査した.結晶化時の照射エネルギー増加により結晶化率が向上し,ピーク波数も高波数側へシフトした.結晶化率の最大値は96%でガラス基板上WLA poly-Siと同等であり,プラスチック上においても,高品質poly-Si膜の形成を実現した.
続いて,WLAによるpoly-Si TFTの欠陥不活性化を試みた.WLA/LA前後のpoly-Si TFTの伝達特性を調査した.WLA後のみTFT特性は改善し,移動度が約30%増加し,オン/オフ比とS値も向上した.さらにpoly-Si膜の水素濃度が増加しており,WLA中に発生した水蒸気中の水素によって電気的欠陥が補償され,特性が向上したと考えられる.

Current Status of Research Progress
Reason

25年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

25年度が最終年度であるため、記入しない。

  • Research Products

    (20 results)

All 2014 2013 Other

All Journal Article (12 results) (of which Peer Reviewed: 12 results) Presentation (5 results) Remarks (1 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] Polycrystalline Silicon Thin-Film Transistor Utilizing Self-Assembled Monolayer for Crystallization2013

    • Author(s)
      Yosuke Tojo, Atsushi Miura, Yasuaki Ishikawa, Ichiro Yamashita and Yukiharu Uraoka
    • Journal Title

      Thin Solid Films

      Volume: 540 Pages: 266-270

    • Peer Reviewed
  • [Journal Article] Size Control in ZnO Nano-Pillar Fabrication Using a Gel-Nanoimprint Process2013

    • Author(s)
      Yasuaki Ishikawa, Shinji Araki, Min Zhang and Yukiharu Uraoka
    • Journal Title

      Applied Mechanics and Materials

      Volume: 372 Pages: 149-152

    • Peer Reviewed
  • [Journal Article] Memristive Nanoparticles Formed Using a Biotemplate2013

    • Author(s)
      Mutsunori Uenuma, Takahiko Ban, Naofumi Okamoto, Bin Zheng, Yasuhiro Kakihara, Masahiro Horita, Yasuaki Ishikawa, Ichiro Yamashita, and Yukiharu Uraoka
    • Journal Title

      Royal Society of Chemical Advances

      Volume: 3 Pages: 18044-18048

    • Peer Reviewed
  • [Journal Article] Analysis of Electronic Structure of Amorphous InGaZnO/SiO2 Interface by Angle-Resolved X-Ray Photoelectron Spectroscopy2013

    • Author(s)
      Yoshihiro Ueoka, Yasuaki Ishikawa, Naoyuki Maejima, Fumihiko Matsui, Hirosuke Matsui, Haruka Yamazaki, Satoshi Urakawa, Masahiro Horita, Yasuaki Ishikawa, Hiroshi Daimon, and Yukiharu Uraoka
    • Journal Title

      Journal of Applied Physics

      Volume: 114, 16 Pages: 163713

    • Peer Reviewed
  • [Journal Article] Effect of Contact Material on Amorphous InGaZnO Thin-Film Transistor Characteristics2013

    • Author(s)
      Yoshihiro Ueoka, Yasuaki Ishikawa, Juan Paolo Bermundo, Haruka Yamazaki, Satoshi Urakawa, Yukihiro Osada, Masahiro Horita, and Yukiharu Uraoka
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 53, 3S1 Pages: 03CC04

    • Peer Reviewed
  • [Journal Article] Crystallization of amorphous Ge thin film using Cu nanoparticle synthesized and delived by ferritin2013

    • Author(s)
      M. Uenuma, B. Zheng, K. Bundo, M. Horita, Y.Ishikawa, H.Watanabe, I. Yamashita and Y. Uraoka
    • Journal Title

      Journal of Crystal Growth

      Volume: 382 Pages: 31-35

    • Peer Reviewed
  • [Journal Article] Thermal Reversibility in Electrical Characteristics of Ultraviolet/Ozone-Treated Graphene2013

    • Author(s)
      Yana Mulyana, Masahiro Horita, Yasuaki Ishikawa, Yukiharu Uraoka, and Shinji Koh
    • Journal Title

      Appl. Phys. Lett.

      Volume: 103 Pages: 3107-3111

    • DOI

      10.1063/1.4818329

    • Peer Reviewed
  • [Journal Article] Characterizations of Al2O3 Gate Dielectric Deposited on n-GaN by Plasma-Assisted Atomic Layer Deposition2013

    • Author(s)
      Koji Yoshitsugu, Masahiro Horita, Yasuaki Ishikawa, and Yukiharu Uraoka
    • Journal Title

      Physica Status Solidi C,

      Volume: 10 Pages: 1426-1429

    • DOI

      DOI: 10.1002/pssc.201300273

    • Peer Reviewed
  • [Journal Article] Thermal Distribution in Amorphous InSnZnO Thin-Film Transistor2013

    • Author(s)
      Satoshi Urakawa, Shigekazu Tomai, Yoshihiro Ueoka, Haruka Yamazaki, Masashi Kasami, Koki Yano, Dapeng Wang, Mamoru Furuta, Masahiro Horita, Yasuaki Ishikawa, and Yukiharu Uraoka
    • Journal Title

      Physica Status Solidi C

      Volume: 10 Pages: 1561-1564

    • DOI

      DOI: 10.1002/pssc.201300253

    • Peer Reviewed
  • [Journal Article] Highly Reliable Polysilsesquioxane Passivation Layer for a-InGaZnO Thin-Film Transistors2013

    • Author(s)
      Juan Paolo Bermundo, Yasuaki Ishikawa, Haruka Yamazaki, Toshiaki Nonaka, and Yukiharu Uraoka
    • Journal Title

      ECS Journal of Solid State Science and Technology

      Volume: 3 Pages: Q16

    • DOI

      doi: 10.1149/2.011402jss

    • Peer Reviewed
  • [Journal Article] The Influence of Fluorinated Silicon Nitride Gate Insulator on Positive Bias Stability Toward Highly Reliable Amorphous InGaZnO Thin-Film Transistors2013

    • Author(s)
      Haruka Yamazaki, Yasuaki Ishikawa, Mami Fujii, Yoshihiro Ueoka, Masaki Fujiwara, Eiji Takahashi, Yasunori Ando, Naoyuki Maejima, Hirosuke Matsui, Fumihiko Matsui, Hiroshi Daimon, and Yukiharu Uraoka
    • Journal Title

      ECS Journal of Solid State Science and Technology

      Volume: 3 Pages: Q20

    • DOI

      doi: 10.1149/2.014402jss

    • Peer Reviewed
  • [Journal Article] The adsorption mechanism of titanium-binding ferritin to amphoteric oxide2013

    • Author(s)
      M. Fukuta, N. Zettsu, I. Yamashita, Y. Uraoka, and H. Watanabe
    • Journal Title

      Colloid and Surfaces B: Biointerfaces

      Volume: 102 Pages: 435

    • DOI

      doi: 10.1016/j.colsurfb.2012.07.042. Epub 2012 Aug 14.

    • Peer Reviewed
  • [Presentation] Reliability of Oxide Thin Film Transitors2013

    • Author(s)
      Yukiharu Uraoka
    • Organizer
      IDMC 2013
    • Place of Presentation
      Taiwan
    • Year and Date
      2013-08-30
  • [Presentation] Size Control in ZnO Nano-Pillar Fabrication Using a Gel-Nanoimprint Process

    • Author(s)
      Yasuaki Ishikawa, Shinji Araki, Min Zhang, and Yukiharu Uraoka
    • Organizer
      2nd Int'l Conf. on Adv. Mat. Design and Mech.
    • Place of Presentation
      Osaka
  • [Presentation] Themal Distribution in Amorphous InSnZnO Thin-Film Transistor

    • Author(s)
      Satoshi Urakawa, Shigekazu Tomai, Yoshihiro Ueoka, Haruka Yamazaki, Masashi Kasami, Koki Yano, Dapeng Wang, Mamoru Furuta, Masahiro Horita, Yasuaki Ishikawa, and Yukiharu Uraoka
    • Organizer
      The 40th International Symposium on Compound Semiconductors
    • Place of Presentation
      Kobe
  • [Presentation] Evaluation of TaOx Nanoparticles for Resistive Random Access Memory

    • Author(s)
      Keisuke Kado, Takahiko Ban, Mutsunori Uenuma, Yasuaki Ishikawa, Ichiro Yamashita, and Yukiharu Uraoka
    • Organizer
      2013 International Meeting for Future of Electron Devices, Kansai
    • Place of Presentation
      Osaka
  • [Presentation] Unique Property of a-InGaZnO/Ag Interface on Thin-Film Transistor

    • Author(s)
      Yoshihiro Ueoka, Yasuaki Ishikawa, Juan Paolo Bermundo, Haruka Yamazaki, Satoshi Urakawa, Yukihiro Osada, Masahiro Horita, and Yukiharu Uraoka
    • Organizer
      20th International Workshop on Active-Matrix Flatpanel Displays and Devices
    • Place of Presentation
      Kyoto
  • [Remarks] Information Device Science Laboratory

    • URL

      http://mswebs.naist.jp/LABs/uraoka/index.html

  • [Patent(Industrial Property Rights)] 保護膜を具備するはくトランジスタ基板およびその製造方法2014

    • Inventor(s)
      石河泰明、浦岡行治
    • Industrial Property Rights Holder
      石河泰明、浦岡行治
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      特願2014-017619
    • Filing Date
      2014-01-31
  • [Patent(Industrial Property Rights)] 基板上へのナノ粒子の配置方法2013

    • Inventor(s)
      浦岡行治、上沼睦典
    • Industrial Property Rights Holder
      浦岡行治、上沼睦典
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      特願2013-241968
    • Filing Date
      2013-11-22

URL: 

Published: 2015-05-28  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi