Lead-free solder alloys have been around for as long as people have done soldering, with sources dating back about 5,000 years. Most of these alloys were combinations like copper-silver or silver ...

Fig. 3: Surfaces of possible delamination. Delamination could occur between EMC and copper LF, EMC and lead (Pb) solder, EMC and Al die pad and/or EMC and nickel (Ni) lead pad (figure 3). The weakest ...