Organic Metals Take The Stage

摘要

There are a variety of surface finishes to choose from these day including OSP, HASL, ENIG, immersion silver and immersion tin. When I visit board shops, I often am asked, "Why can't those assembly guys chose one surface finish, so I can get rid of all the rest?" The fact of the matter is that each surface finish has its strengths and weaknesses. Based on an assembly site's driving need -whether it be cost, shelf life, appearance,rnlong term reliability, component attachment method or sol-derability performance - one surface finish may be a better fit than the next.