Is a Scuff or Scratch on the oxide ruled out? John Balchunas Supplier Quality Engineer Email: [log in to unmask] Tel: 763-278-2249 Fax: 763-767-4635 From: Ian Hanna [mailto:[log in to unmask]] Sent: Thursday, October 27, 2011 1:17 PM To: TechNet E-Mail Forum; John Balchunas Subject: Re: [TN] Delam or Inner Core Bond Enhance Anomaly or something else? are you able to view it under magnification at an area where the inner-layer copper terminates? say the clearances around those two plated holes? this may give strong clues -- delam will continue even a small way beyond the limit of the copper -- oxide marks obviously not cheers -- ian From: John Balchunas <[log in to unmask]> To: <[log in to unmask]> Date: 27/10/2011 11:09 AM Subject: [TN] Delam or Inner Core Bond Enhance Anomaly or something else? Sent by: TechNet <[log in to unmask]> ________________________________ 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 <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] <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 <http://listserv.ipc.org/archives> For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ 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 -----------------------------------------------------