Hi Technetters, I have observed long term reliability problems with this exact issue when I worked for the Burroughs Corp (now part of Unisys) many moons ago. The issue is "crrepage" of the tin/lead through the gold srface over a long period of time, resultiong in a tin/lead/gold alloy subject to fretting corrosion. Any help I can offer, please contact me directly. Regards, Ed Popielarski QTA Machine 714-364-6614 You wrote: > >Darrell Daigle wrote: >> >> Hello technetters, I will try this for the fifth time,I apologize if your >> file is loaded with this request, it has been returned to me as undelivered >> mail. >> >> If a gold finger with splashes of tin/lead on it "does not" make contact >> within a gold socket, will there be galvanic corrosion. >> Unfortunately IPC-A-600 does not address reliability issues, if there is >> reference material out there, I would like to know. > >Hello All: > >Along similar lines I have observed select corrosion of solder occurr >during the resist stripping process, but only solder connected to gold >tabs. It was presumed a galvanic corrosion was taking place but the >"pathway" of this corrosion has not been identified. Perhaps anyone >with an answer to the above question could shed some light on this >problem as well. Thanks for your assistance! > >Regards, >Ted Stern > >*********************************************************************** **** >* TechNet mail list is provided as a service by IPC using SmartList v3.05 * >*********************************************************************** **** >* To subscribe/unsubscribe send a message <to: [log in to unmask]> * >* with <subject: subscribe/unsubscribe> and no text in the body. * >*********************************************************************** **** >* If you are having a problem with the IPC TechNet forum please contact * >* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * >*********************************************************************** **** > > *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************