We are seeing yellow discoloration of Immersion Silver Boards right out
of the package from our board house.  They seem to solder fine, however
this is causing some concern with our customer.  I suspect that it could
be a thin film of  silver bromide or silver carbonate both which are
yellow powders.
 
Any one seen this before?
 
What is it?
 
How does the board house remedy this situation?
 
Any associated concerns or other bits of wisdom?
 
I would truly appreciate any input.
 

Rich Kraszewski 

Advanced Manufacturing Engineer - KEDS

Phone:  260.925.8919

 

 

 

 

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