Will Solder Wet Your Board?
A test coupon is dipped in flux, then immersed in SAC305 solder at 255C. After inspection: solder must form continuous uniform coating with at least 95% coverage. Dewetting or non-wetting is a failure. We test every surface finish type - ENIG, lead-free HASL, immersion silver, immersion tin, OSP - on a per-lot sampling basis.
