Forwarded from David Spencer wrote: > Background > I have been working on, or should I say > "I have been worked over by..", the > requirements of GR-78-CORE. Requirement > R6-8 states, "Silver shall not be used > as a conductor or contact finish. [] > Tin shall not be used as a conductor or > contact finish unless subjected to an > approved reflow process." > > During our prototype phase, we have used > immersion gold. Our Mfg. Eng. wants to > move to immersion silver or white tin, > because the gold is expensive and can have > solderability/reliability problems related > to the nickel plating under the gold flash. > > Questions > Does anyone have a ruling on the use of > silver or white tin immersion finishes from > any of the RBOC's as it relates to the > requirements of GR-78-CORE? > > Are there any documented tests of these > finishes available, i.e. accelerated aging, > solderability, insulation resistance, etc ? > > Does anyone have experience with either of > these finishes in the hygroscopic dust/gaseous > contamination test suite from GR-63-CORE? > > Thanks for your help! > Dave Spencer ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################