What's the difference of the OSP, HASL, Ni/Au immersion| 5 April, 2004
Hello: What's the difference of the OSP, HASL, Ni/Au immersion and ENIG? What's the advantage and disadvantage of them, special for the BGA pad? I had seen some discussion in the forum, but they are for a long time ago. Could somesone can give me the newest one? Thanks a lot!