Hi Kenny Clutching at straws here - any chance you have "drilling" residues before the via is plated? Can it be something from the via plating operation that has changed? Have you noticed de-wetting anywhere other than the via's? Regards Graham Naisbitt [log in to unmask] Phone: +44 (0)12 5252 1500 Mobile: +44 (0) 79 6858 2121 --------------------------------------------------- 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 -----------------------------------------------------