Formation mechanism of dark bridge between contacts with very slow opening speed

Hiroyuki Ishida, Shosuke Suzuki, Hideaki Sone, Hiroshi Inoue, Masanari Taniguchi, Tasuku Takagi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The mechanism of dark bridge formed with very slow contact separating speed was empirically shown with some discussions from the experimental results which the authors have obtained by using the cantilever system for controlling contact gap. By analyzing the obtained results, we will assume some concept of formation mechanism of dark bridge. Since the thermal effect is inevitable in the bridge formation, this will be inferred from two points; one is the a-spot change at initial state of bridge forming, and another one is the thermal expansion due to bridge current that affects the shape of bridge. This paper will show from these two points the conceptual bridge formation mechanism in case of non-melting state of contact bridge which is called here dark bridge.

Original languageEnglish
Pages (from-to)1136-1140
Number of pages5
JournalIEICE Transactions on Electronics
Issue number8
Publication statusPublished - 2006 Aug


  • Bridge shape
  • Dark bridge
  • Thermal expansion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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