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The solder joint reliability of IGBT chip surface interconnection with a lead-frame structure is described in the power cycling (P/C) capability which is greatly improved due to a chip surface cooling effect in comparison with aluminum wire interconnection. The lead-frame is joined on a Ni and Au plated chip surface with Sn-Ag or Sn-Sb system solders. The P/C capability obtained with the Sn-Sb system...
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