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Fabrication of medical electronic devices by micro-joining

Research Project

Project/Area Number 16560638
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Material processing/treatments
Research InstitutionUniversity of Hyogo

Principal Investigator

FUKUMOTO Shinji  University of Hyogo, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (60275310)

Co-Investigator(Kenkyū-buntansha) TSUBAKINO Harushige  University of Hyogo, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (00109894)
YAMAMOTO Atsushi  University of Hyogo, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (70220449)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2004: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsMicro-joining / Nickel fine wire / Stainless steel fine wire / Resistance welding / Crossed wire welding / Gold plating / ニッケルワイヤ / マイクロ溶接 / ブレージング / メディカルデバイス / フィレット / ステンレス鋼ワイヤ
Research Abstract

In this century, we have a serious problem such as aging population combined with the diminishing number of children. This situation will increase opportunity of surgery for aged people. Therefore, it is necessary to fabricate new medical implants that are able to be implanted in human body for long time. Medical devices are generally small, precise and complicate. So micro-joining techniques must be needed for fabricate them.
In the production of small electronic and medical devices, it is often necessary to produce cross wire joints in fine nickel and stainless steel wires. Therefore, commercial purity nickel or stainless steel fine wires were welded to itself by the resistance microwelding. A study has been performed to improve the welding process considering the welding mechanism. A welding mechanism consists of mainly four stages which are cold wire collapse, surface melting, liquid phase squeezed out and solid state bonding. Set down which indicates the depth of penetration for wires was not adequate to evaluate the joint quality. Sufficient local heat generation as well as set down is the key to high quality welds, first to generate enough transient surface melting, second to facilitate plastic deformation in order to squeezed out liquid and expand the bonded area. This requires a proper balance of high initial contact resistance and sufficient high welding force, which could be obtained by setting a low firing force.
The above results could be a cornerstone to fabricate the medical devices.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (9 results)

All 2005 2004

All Journal Article (9 results)

  • [Journal Article] Interfacial phenomena and joint strength in resistance microwelding of crossed Au-plated Ni wires2005

    • Author(s)
      S.Fukumoto, Zheng Chen, Y.Zhou
    • Journal Title

      Metall.Mater.Trans. A 36A

      Pages: 2717-2724

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] ニッケル細線のマイクロ抵抗溶接における入熱および変形制御2005

    • Author(s)
      福本信次, 椿野晴繁, Y.Zhou
    • Journal Title

      溶接学会誌 23

      Pages: 571-576

    • NAID

      110003496134

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Control of heat input and deformation on resistance micro-welding of fine nickel wires2005

    • Author(s)
      S.Fukumoto, H.Tsubakino, A.Yamamoto
    • Journal Title

      Quarterly Journal of Japan Institute of Welding Society 23(4)

      Pages: 571-576

    • NAID

      110003496134

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Interfacial phenomena and Joint strength in resistance microwelding of crossed Au-plated Ni wires2005

    • Author(s)
      S.Fukumoto, Zheng Chen, Y.Zhou
    • Journal Title

      Metall Mater. Trans. A 36A(10)

      Pages: 2717-2724

    • Related Report
      2005 Annual Research Report
  • [Journal Article] ニッケル綿綿のマイクロ抵抗溶接における入熱および変形制御2005

    • Author(s)
      福本信次, 椿野晴繁, Y.Zhou
    • Journal Title

      溶接学会論文集 23(4)

      Pages: 571-576

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Mechanism of Resistance Microwelding of Fine Nickel Wires2004

    • Author(s)
      S.Fukumoto, Y.Zhou
    • Journal Title

      Metall.Mater.Trans. A 35A

      Pages: 3165-3176

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Mechanism of Resistance Microwelding of Fine Nickel Wires2004

    • Author(s)
      S.Fukumoto, Y.Zhou
    • Journal Title

      Metall.Mater.Trans.A. 35A(10)

      Pages: 3165-3176

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 「研究成果報告書概要(欧文)」より2004

    • Author(s)
      S.Fukumoto, Zheng Chen, Y.Zhou
    • Journal Title

      Metall.Mater.Trans.A. 35A(10)

      Pages: 3165-3176

    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Mechanism of Resistance Microwelding of Crossed Fine Nickel Wires2004

    • Author(s)
      S.Fukumoto, Y.Zhou
    • Journal Title

      Metall.Mater.Trans.A 35A(10)

      Pages: 3165-3176

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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