Helena, I forgot to mention that many delaminations are quite repairable. There are repair procedures outlined in IPC-STD-7711/7721. They are not automatic scrap. This requires MRB authority from your customer, however. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Pasquito, Helena Sent: Tuesday, September 12, 2006 11:45 AM To: [log in to unmask] Subject: [TN] Delamination Hi TechNetters, Let me ask a question; I know delamination is bad, but why? What is the failure mode to the board when a board delaminates and would there ever be an instance that a board that delaminates is still OK to use? This is a Class 3 application. Yes, I know what the IPC standards say but not real sure about the board process. Yes, I "googled" and there is a lot of stuff out there. Maybe someone can recommend some reading material (hopefully short and sweet and to the point). Thanks! Helena Helena Pasquito Manufacturing Skills Instructor M/A-COM, Tyco Electronics 1011 Pawtucket Blvd., M/S 107 Lowell, MA 01853 978-442-5024 [log in to unmask] --------------------------------------------------- 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 -----------------------------------------------------