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Toru KAISE
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Tadashi TAKEMOTO
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Hiroo KATAOKA
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Yoshitada WATANABE
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Sadanori ITO
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Shuichi YANAGI
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Shuichi FUKUDA
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Hideharu TSUCHIYA, Yoshiyuki IHARA, Hiroyuki YOSHIDA
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Akihiro HIGUCHI, Kazunori HIRAOKA
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Tensile strength at a soldered connected point was investigated after applying high current density. Two copper wires of 180 μm in diameter were connected with Sn-3Ag-0.5Cu(wt%) solder. Tensile strength of the soldered point was measured after applying electric current of 0〜19.7kA/cm^2 for 0, 30, 100 and 300 hours. Degradation of tensile strength was confirmed when the current density was higher than 11.8kA/cm^2 and the applying time of current was over 100 hours. The open failure was often observed at a cathode side. In addition, SEM picture of cathode side was different from that of anode side. These results indicate that degradation of tensile strength was caused by electromigration.
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