Experimental data on the creep and failure of the Sn-3.0%Ag, Sn-3.5%Ag, and
Sn-4.0%Ag lead free solder alloys are described. Further development of th
e alloys' failure micromechanism, proposed earlier, is presented. Possible
ways of improving the mechanical properties of Sn-Ag-based solder alloys ar
e discussed.