Hi Pradeep, You simply need to provide more information. Generally speaking, failures after 3 years of service are most likely wear-out failures and likely the consequence of an inadequate 'Design-for-Reliability.' They could be solder joint failures, PTH barrel failures, component wear-out failures. ONLY a proper root cause analysis can determine what caused the failures, and whether to expect more--and also who might be to blame. Regards, Werner Engelmaier Engelmaier Associates, L.C. Electronic Packaging, Interconnection and Reliability Consulting 7 Jasmine Run Ormond Beach, FL 32174 USA Phone: 386-437-8747, Cell: 386-316-5904 E-mail: [log in to unmask], Website: www.engelmaier.com -----Original Message----- From: mp3 <[log in to unmask]> To: [log in to unmask] Sent: Mon, 6 Apr 2009 1:05 am Subject: [TN] PCB Failure analysis Hello, One of our customers have comeback after 3 years asking for a failure analysis report on a 10 layer industrial grade PCB. The PCB was supplied 3 years back and has been functioning satisfactorilly for the last 3 years. Now the customer has 3 PCBs which have failed and is insisting it is a PCB related failure. The failure in all the 3 circuit boards are in the same area around a quadpack IC. We verified the traveller card of the boards processed and found all aspects to be compliant. The PCBs were being used in a jig for high reliability harness checking. We feel it should be a component related issue rather than a PCB related issue. Can you give us some inputs on the above which will help us in arriving at the right conclusion. Rgds Pradeep ------------------------------- Micropack Ltd, Bangalore, India --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 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 15.0 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 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 -----------------------------------------------------