OK, I know you guys are probably going to shake your head on this one, but I have to ask. We have a double sided fine pitch SMT assembly and we decided to go to white tin for the pad material. Here's where the problem comes in, we ran one side and when we started process the other side we found counterfeit chips. We stopped production for two weeks until the correct parts came in. When we tried to run the boards again, the PCB's oxidized so badly over the two weeks that we can not get the solder to wet. Any suggestions, other than scrapping the 170 assemblies at $600 a piece? --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------