Electronics Forum | Thu Feb 21 08:11:44 EST 2008 | scottp
I agree, the level of Pd plays a role here. Knowing that some versions were probably OK we tried to develop a soldering test for PdAg components with pass/fail criteria, but decided it wasn't worth the engineering effort for a finish that's so rarel
Electronics Forum | Wed Feb 20 16:55:52 EST 2008 | flipit
Pd/Ag doesn't usually dissolve (leach) nearly as bad as Ag only. In my hybrid days, we would use 62/36/2 solder. The 2% silver helps saturate the solder joint and thus keep the Ag from being leached away by the Sn.
Electronics Forum | Wed Feb 20 09:07:19 EST 2008 | scottp
I've done some pretty scary cross-sections of chip sized coils with AgPd terminations with Pb free solder. The AgPd went into solution and there was essentially nothing left to solder to. We also had convex fillet shapes that clearly didn't meet wo
Electronics Forum | Thu Aug 07 11:58:36 EDT 2008 | pbarton
We have experienced the same problem with Pd/AG and P/Ag terminations on precision resistive parts. The problem is dissolution of the termination metallisation into the bulk solder. This is exacerbated by the higher thermal profiles required for RoHS
Electronics Forum | Thu Jun 29 08:50:39 EDT 2006 | russ
Any possiblity that there are vias in the affected pads? Russ
Electronics Forum | Thu Jun 29 14:41:44 EDT 2006 | AR
No, no vias anywhere near the affected area
Electronics Forum | Thu Jun 29 04:07:25 EDT 2006 | slaine
Hi I manufacture a range of components with Ag,Pd,Pt terminatons. Has the solder wetted to the componet and is the termination still left on the component? I would expect the solder to remain on the pad though, if all your other devices on the pcb ar
Electronics Forum | Fri Jul 07 02:20:03 EDT 2006 | AR
Hi Yes, this is the only component with Ag/Pd finish. I found that by applying a copious amount of solder on the pad (we are using a dispenser) the component will be soldered. Although most of the solder coalesces on the terminations of the componen
Electronics Forum | Mon Oct 22 21:34:36 EDT 2007 | davef
Double check on this, but we have this little voice in our heads telling us that your AgPd termination is intended for conductive adhesive applications. Check with your component supplier. We recall a thread on SMTnet [ http://www.smtnet.com/forums
Electronics Forum | Tue Oct 23 07:03:52 EDT 2007 | davef
We're not really sure. Usually when solder leaves the pads and wicks-up a component lead, it means the component lead is much warmer than the pad on the board. This is the direction we would have taken this if we hadn't taken the AgPd / conductive e
