Dear technetters,
Is anybody using SN100 (or other high Sn alloys) for SMT reflow soldering applications? what have your experiences been with this alloy?

I have a PCB with a BGA, that is cracking due to mechanical stress (that is not SMT process related), we have a combination of solder cracking, and pad cratering. The PCB currently uses SAC305. We also build a SnPb variant of the same exact board with no issues (the bare board material is different for SnPb and LF versions). I was therefore wondering whether SCA305 alloy properties could be a contributing factor this defect. How does the ductility and shear strength of SN100C compare to SAC305 and 67-37SNPb alloy?

Regards,
Amol





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