Whatever it is, send it back. Brian Kevin Glidden wrote: > We recently received a shipment of PCBs where the exposed outer layer > laminate has staining that looks like copper. I have a photo - > <http://tinyurl.com/yp9za2> http://tinyurl.com/yp9za2 > My question is what would cause this? I've never seen it before, but I am > thinking something in the Copper plating process. The vendor is telling us > it is staining but it is an asthetic issue only. What would cause it? Is it > an asthetic issue only? It seems to me if the staining was caused by some > plating chemistry, then it would effect the laminate properties, > particularly the insulation resistance. > > Thanks! > > Kevin Glidden > Manufacturing Engineer > Luminescent Systems Inc. > > > > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 15.0 > 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 > ----------------------------------------------------- > > --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 -----------------------------------------------------