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
-----------------------------------------------------