Bonjour Technetters, Would a pcb assembly with exposed copper around some vias be reliable if fully coated with conformal coating so copper won't be exposed anymore ? The problem was not detected at the incoming inspection so many pcb were assembled. Board finish is HASL. Thanks for your comments, Salutations, ___________________________ Mario Dion, T.Sc.A./ A.Sc.T. Production Engineering Mediatrix Telecom Inc. --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------