obtw,  it would be helpful to get the parameters of the test 
application the pwb is used in.   Temp, cycling, etc.

Is the "quadpack IC" a power device?  If so what temps does the pwb 
see under the device?

At 10:05 PM 4/5/2009, mp3 wrote:
>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
>
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