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2005 Fiscal Year Final Research Report Summary

Nanometer-scale processing and creation of novel functional materials using low energy high flux neutral beams

Research Project

Project/Area Number 15360016
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thin film/Surface and interfacial physical properties
Research InstitutionTohoku University

Principal Investigator

SAMUKAWA Seiji  Tohoku University, Institute of Fluid Science, Professor, 流体科学研究所, 教授 (30323108)

Co-Investigator(Kenkyū-buntansha) HANE Kazuhiro  Tohoku University, School of Engineering, Professor, 大学院・工学研究科, 教授 (50164893)
ONO Takahito  Tohoku University, School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (90282095)
KONDO Michio  National Institute of Advanced Industrial Science and Technology, Research Initiative for Thin Film Silicon Solar Cells, Deputy Director, 薄膜シリコン系太陽電池研究開発ラボ, 副ラボ長 (30195911)
KUBOTA Tomohiro  Tohoku University, Institute of Fluid Science, Research Associate, 流体科学研究所, 助手 (70322683)
Project Period (FY) 2003 – 2005
Keywordsneutral beam / etching / negative ion / silicon oxynitride / gate electrode etching / low-k film / fin-type vertical MOSFET / nanocolumn
Research Abstract

We have developed a high-performance neutral beam (NB) system. It achieved high neutralization efficiency and high flux by utilizing negative ions for the first time.
A 50-nm-width metal-oxide-semiconductor (MOS) gate etching process was established using the NB system. The oxide leakage current achieved for a MOS capacitor etched by the neutral beam was one order of magnitude lower than that achieved by conventional plasma etching.
A highly selective and low-damage damascene process for porous methyl-silsesquioxane (porous MSQ, k-2.2) films has been realized using the NB system. Use of a SF_6 or CF_4 neutral beam enables etching of porous MSQ with higher selectivity to the photoresist than what can be obtained in a conventional plasma. This is considered to be because the neutral beam eliminates exposure to ultraviolet (UV) light which enhances the resist etching.
Pulse-time-modulated N_2 NB was used to form ultrathin oxynitride films. SiO-N bonds were effectively formed and a shallower, sharper, and higher density N concentration profile in a thin 2 nm SiO_2 film was produced using a pulsed N_2 NB.
Fin-type vertical MOSFETs with damage-less smooth sidewalls were successfully fabricated using the NB system. The fabricated FinFETs realized higher electron mobility than that using a conventional reactive ion etching. The improved mobility is well explained by the atomically-flat surface.
We fabricated nanocolumn structure by using a low energy neutral beam and a ferritin iron-core mask. The iron core in the ferritin was 7 nm in diameter, which was identical to that of the etched nanocolumn. This indicates that neutral-beam etching transferred the structure and size of the iron core to the silicon substrate.
These results indicate that the NB can perform atomically damage-free etching and surface modification of inorganic and organic materials. This technique is a promising candidate for the practical fabrication technology for future nano-devices.

  • Research Products

    (32 results)

All 2006 2005 2004 2003

All Journal Article (24 results) Patent(Industrial Property Rights) (8 results)

  • [Journal Article] Fabrication of a Vertical-Channel Double-Gate MOSFET Using a Neutral Beam Etching2006

    • Author(s)
      遠藤和彦
    • Journal Title

      Japanese Journal of Applied Physics 45・10

      Pages: L279-L281

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ultimate Top-down Etching Processes for Future Nanoscale Devices : Advanced Neutral-Beam Etching2006

    • Author(s)
      寒川誠二
    • Journal Title

      Japanese Journal of Applied Physics 45・4A

      Pages: 2395-2407

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Fabrication of a Vertical-Channel Double-Gate MOSFET Using a Neutral Beam Etching2006

    • Author(s)
      Kazuhiko Endo
    • Journal Title

      Japanese Journal of Applied Physics 45(10)

      Pages: L279-L281

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Ultimate Top-down Etching Processes for Future Nanoscale Devices : Advanced Neutral-Beam Etching2006

    • Author(s)
      Seiji Samukawa
    • Journal Title

      Japanese Journal of Applied Physics 45(4A)

      Pages: 2395-2407

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Highly selective low-damage processes using advanced neutral beams for porous low-k films2005

    • Author(s)
      大竹浩人
    • Journal Title

      Journal of Vacuum Science and Technology B23・1

      Pages: 210-216

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Study of neutral-beam etching conditions for the fabrication of 7-nm-diameter nanocolumn structures using ferritin iron-core masks2005

    • Author(s)
      久保田智広
    • Journal Title

      Journal of Vacuum Science and Technology B23・2

      Pages: 534-539

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] In Vacuo Measurements of Dangling Bonds Created During Ar-Diluted Fluorocarbon Plasma Etching of Si Dioxide Films2005

    • Author(s)
      石川健治
    • Journal Title

      Applied Physics Letters 86

      Pages: 264104-1-206104-3

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Highly anisotropic gate electrode patterning in neutral beam etching using F_2 gas chemistry2005

    • Author(s)
      野田周一
    • Journal Title

      Journal of Vacuum Science and Technology B23・5

      Pages: 2063-2068

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Highly selective low-damage processes using advanced neutral beams for porous low-k films2005

    • Author(s)
      Hiroto Ohtake
    • Journal Title

      Journal of Vacuum Science and Technology B23(1)

      Pages: 210-216

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Study of neutral-beam etching conditions for the fabrication of 7-nm-diameter nanocolumn structures using ferritin iron-core masks2005

    • Author(s)
      Tomohiro Kubota
    • Journal Title

      Journal of Vacuum Science and Technology B23(2)

      Pages: 534-539

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] In Vacuo Measurements of Dangling Bonds Created During Ar-Diluted Fluorocarbon Plasma Etching of Si Dioxide Films2005

    • Author(s)
      Kenji Ishikawa
    • Journal Title

      Applied Physics Letters 86

      Pages: 264104-1-264104-3

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Highly anisotropic gate electrode patterning in neutral beam etching using F_2 gas chemistry2005

    • Author(s)
      Shuichi Noda
    • Journal Title

      Journal of Vacuum Science and Technology B23(5)

      Pages: 2063-2068

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Control of nitrogen depth profile in ultrathin oxynitride films formed by pulse-time-modulated nitrogen beams2004

    • Author(s)
      寒川誠二
    • Journal Title

      Journal of Vacuum Science and Technology A22・2

      Pages: 245-249

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A 7-nm nanocolumn structure fabricated by using a ferritin iron-core mask and low-energy Cl neutral beams2004

    • Author(s)
      久保田智広
    • Journal Title

      Applied Physics Letters 84・9

      Pages: 1555-1557

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 50 nm gate electrode patterning using a neutral-beam etching system2004

    • Author(s)
      野田周一
    • Journal Title

      Journal of Vacuum Science and Technology A22・4

      Pages: 1506-1512

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 新しいビームプロセスによるトップダウン加工=究極のトップダウン加工を目指して=2004

    • Author(s)
      寒川誠二
    • Journal Title

      表面科学 25・10

      Pages: 618-627

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Control of nitrogen depth profile in ultrathin oxynitride films formed by pulse-time-modulated nitrogen beams2004

    • Author(s)
      Seiji Samukawa
    • Journal Title

      Journal of Vacuum Science and Technology A22(2)

      Pages: 245-249

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A 7-nm nanocolumn structure fabricated by using a ferritin iron-core mask and low-energy Cl neutral beams2004

    • Author(s)
      Tomohiro Kubota
    • Journal Title

      Applied Physics Letters 84(9)

      Pages: 1555-1557

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 50 nm gate electrode patterning using a neutral-beam etching system2004

    • Author(s)
      Shuichi Noda
    • Journal Title

      Journal of Vacuum Science and Technology A22(4)

      Pages: 1506-1512

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Advanced Beam Processes for Precise Top-Down Patterning2004

    • Author(s)
      Seiji Samukawa
    • Journal Title

      Journal of the Surface Science Society of Japan 25(10)

      Pages: 618-627

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Ultrathin Oxynitride Films Formed by Using Pulse-Time-Modulated Nitrogen Beams2003

    • Author(s)
      寒川誠二
    • Journal Title

      Japanese Journal of Applied Physics 42・7B

      Pages: L795-L797

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 中性粒子ビームによるダメージフリー高精度プロセス2003

    • Author(s)
      寒川誠二
    • Journal Title

      応用物理学会誌 72・12

      Pages: 1536-1540

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ultrathin Oxynitride Films Formed by Using Pulse-Time-Modulated Nitrogen Beams2003

    • Author(s)
      Seiji Samukawa
    • Journal Title

      Japanese Journal of Applied Physics 42(7B)

      Pages: L795-L797

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Damage-free and precise processes using neutral beams2003

    • Author(s)
      Seiji Samukawa
    • Journal Title

      OYO BUTURI 72(12)

      Pages: 1536-1540

    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] エッチング方法2004

    • Inventor(s)
      寒川誠二 他2名
    • Industrial Property Rights Holder
      株式会社荏原製作所
    • Patent Publication Number
      特開2005-259873
    • Filing Date
      2004-03-10
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] エッチング装置2004

    • Inventor(s)
      寒川誠二 他4名
    • Industrial Property Rights Holder
      株式会社東芝
    • Patent Publication Number
      特開2005-260195
    • Filing Date
      2004-04-23
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] ビーム源及び該ビーム源を備えたビーム処理装置2003

    • Inventor(s)
      寒川誠二 他5名
    • Industrial Property Rights Holder
      株式会社荏原製作所, 東北大学長
    • Patent Publication Number
      特開2004-281228
    • Filing Date
      2003-03-14
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] ビーム源用電極及びビーム源用電極の製造方法2003

    • Inventor(s)
      寒川誠二 他5名
    • Industrial Property Rights Holder
      株式会社荏原製作所, 東北大学長
    • Patent Publication Number
      特開2004-281229
    • Filing Date
      2003-03-14
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] ビーム源及びビーム処理装置2003

    • Inventor(s)
      寒川誠二 他5名
    • Industrial Property Rights Holder
      株式会社荏原製作所, 東北大学長
    • Patent Publication Number
      特開2004-281230
    • Filing Date
      2003-03-14
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] ビーム源及びビーム処理装置2003

    • Inventor(s)
      寒川誠二 他5名
    • Industrial Property Rights Holder
      株式会社荏原製作所, 東北大学長
    • Patent Publication Number
      特開2004-281231
    • Filing Date
      2003-03-14
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] ビーム源及びビーム処理装置2003

    • Inventor(s)
      寒川誠二 他5名
    • Industrial Property Rights Holder
      株式会社荏原製作所, 東北大学長
    • Patent Publication Number
      特開2004-281232
    • Filing Date
      2003-03-14
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] 中性塩素原子平行ビームによるナノマスクエッチング2003

    • Inventor(s)
      寒川誠二 他1名
    • Industrial Property Rights Holder
      松下電器産業株式会社
    • Patent Publication Number
      特開2005-144585
    • Filing Date
      2003-11-13
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2007-12-13  

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