Electronics Forum | Thu Sep 03 02:38:00 EDT 2009 | sachu_70
Does the established joint still exist if once again re-touched by a soldering iron, or does it return to the original problem? Wetting issues on pad could be for many reasons and you could analyze with a cause effect diagram.
Electronics Forum | Tue Nov 24 19:17:29 EST 2009 | gregoryyork
It could be that the Sn96 has dissolved the Tin rapidly and gone for the Copper. What dwell times are they using with the irons? Probably better off using a Tin Copper alloy for reduced dissolution worth a try Cheers Greg
Electronics Forum | Tue Jul 06 11:58:44 EDT 2010 | baildl632
What type of finish are the PCB's? HASL, tin immersion, silver immersion,........we've seen all the above problems with HASL finished boards. Usually either reheating w/ a soldering iron or "burnishing" with a scotch brite pad has worked for us.