The problem with putting gold over copper is that the copper will diffuse into the gold, which is why a Ni barrier is used for gold-plated contacts. I have no idea how a gold flash directly over Cu would work as a soldering finish, but it's easier to solder on Cu than Ni. ----- Original Message ----- From: <[log in to unmask]> To: <[log in to unmask]> Sent: Thursday, March 01, 2001 9:58 PM Subject: [TN] Soft Gold Over Copper > I have been told by a customer that various folks are putting 1-3 micro > inches of solft gold directly over copper on PCBs in place of solder for > thru-hole applications. Has anyone out there been trying this successfully? > What about oxidation issues, leeching of gold into the wave solder pot, > using no-clean flux with oxidized leads, etc??? Any help would be > appreciated. Thanks, Bill > > -------------------------------------------------------------------------- ------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8d > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL > Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information, or 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 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------