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The electronics industry has successfully transitioned to lead free soldering for computer and consumer products while in the automotive industry due to the very high reliability requirements this step is still in an ongoing process. In order to ensure or even to enhance the reliability of electronics the improvement of lead free solder joints based on Sn-Ag-Cu (SAC) solder has been the focus of many...
The solders used for this study are Sn2.5Ag0.8Cu doped with 0.03 wt.% Fe, Co, or Ni and 0, 0.005, 0.01, 0.06, or 0.1 wt.% Ni. Reaction conditions included multiple reflows for up to 10 times and solid-state aging at 160degC for up to 2000 hrs. In multiple reflow study, Cu6Sn5 was the only reaction product observed for all the different solders used. Reflows using the solder without doping produced...
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