Need some help fellow techneters!


We are  looking for a supplier of boards that will do a Tin/Silver plating.

We are soldering a leadwire to a tin\lead plated SMT pad with Tin/silver wire and we are seeing a few failures due to an intermetallic bond. We are using the Tin/silver for solder joint strength.  It was suggested to me that we are having this problem due to the fact that the tin/lead solder on the pad takes longer to solidify (lower melting point) than the tin/silver solder joint. This is why we are looking for a supplier of tin/silver plating.

If there are any other suggestions on resolving our problem I am open to them.

Thanks and I look forward to your responses,

  John