Research Article

Microstructure, Mechanical, and Electrical Properties and Corrosion Analysis of Lead-Free Solder CSI Joints on Cu Substrate Using Novel Concentrated Solar Energy Soldering (CSES) Method

Figure 15

Representative SEM micrographs showing microstructure and EDS results at solder portion of different lead-free and SnPb solder joints created using CSES and CSI methods (before and after corrosion). Element wt.% values are at solder portion of solder joints.