Hi Roger, Gold dissolves pretty fast into copper. Even at room temperature. I doubt the flex could make it from fab to assembly fast enough for the gold to still be on the surface of the copper. (I certainly wouldn't want to try soldering to it.) Thanks Ryan Grant Advanced Technology Engineer MCMS (208) 898-1145 [log in to unmask] > -----Original Message----- > From: Roger M. Stoops [SMTP:[log in to unmask]] > Sent: Tuesday, June 13, 2000 4:19 PM > To: [log in to unmask] > Subject: [TN] Gold over Copper?!? > > I am losing my mind... > > I have just been asked to specify a flex circuit to have 3-5u in of gold > directly on the copper. (That's right folks, no nickel!) > This might be okay if a few parts were being soldered in place, but one > end of the flex is for a FPC connector (also gold plated). > Is this a good idea? Your comments, please, please, PLEASE! > Or else I am losing my mind... hey, where did I put my mi... > > Sincerely, Lost One > > Roger M. Stoops, PCB Designer > > Spectra Precision Inc. Ph: 937.233.8921 > 5475 Kellenburger Rd. 937.233.4574 ext > Dayton, OH 45424-1099 288 > USA Fax: 937.233.7511 > > Member IPC > Designer's Council, > C.I.D. > > ############################################################## > 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 > ############################################################## ############################################################## 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 ##############################################################