Good Morning and Your help is appreciated to figure out what a discoloration is under the solder mask of a bare board which does not change after one reflow temperature cycle. The Prebake and Postbake photos are in my PCB Inspection Photos Gallery at the TechNet Group Site http://ipc-technet.groupsite.com/galleries?page=3 What is it?... Delam, or Inner Core Bond Enhance Anomaly, or something else...? Thanks for your help with this. John Balchunas Supplier Quality Engineer Email: [log in to unmask] <mailto:[log in to unmask]> Tel: 763-278-2249 Fax: 763-767-4635 ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------