contact your local pcb chemistry rep's for samples of the first part of 
 their two part solder strippers. they typically leave the copper/tin 
 intermetallics behind. don't know what to expect with gold.


______________________________ Reply Separator _________________________________
Subject: Sn-Pb etch
Author:  [log in to unmask] at corp
Date:    1/24/96 10:58 AM


Can anyone recommend a method to completely remove the 63-37 solder from a 
surface, leaving the underlying intermetallics untouched?   I have tried 
hydrochloric acid; it works for solder reflowed on Cu, but in joints with 
gold it apparently re-precipitates gold artifacts.  Any help would be 
greatly appreciated.
 
Edwin Bradley
Motorola