Connie The industry has been using OSP boards for years. After a few thermal cycles the coating is usually removed. Since the reflowed solder usually does not wet the complete land, there is in point of fact exposed copper on the board. There must be millions of such cases in the field and I have not heard of any associated catastrophic problem. Other good examples of exposed copper in everyday occurrences are water pipes and light switches. Although copper forms an oxide it is limited to the surface. It does not behave as a ferrous material. Best regards Lee -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Connie Korth Sent: Thursday, December 09, 2004 9:59 AM To: [log in to unmask] Subject: [TN] copper exposed Good AM Techies, We have some resistors that did not take the tinning all the way to the body. There is some copper exposed by the body, but the lead in the solder connection is good. Per IPC-610, if copper is exposed due to deformation or nicks/gouges >10%, it is a defect. We have absolutely no deformation in these component leads. My decision was to leave them in the board. We have a Mfg. Engineer who wants to have them all replaced. He feels I have interpreted the IPC-610 incorrectly. I feel that this is unnecessary rework that could damage the PCB. Any supporters out there? Connie M. Korth Quality Specialist Reptron Manufacturing Services, Hibbing [log in to unmask] 218.262.8209 --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------