"A good PWB will normally fail within the laminate material.  "

That's a pretty broad statement. I wouldn't take that bet personally.

It's tempting as an OEM for failure investigation to begin with the
premise that responsibility lies with any or all inputs except the
design, assembly process.  Yep'r, don't keep no mirrors around here to look in.


At 07:59 AM 1/12/2012, Woolley, Mark D. (Mark) wrote:
>
>
>I am in the middle of an issue concerning a high temperature Laminate
>and low pull force copper pads.  The copper can be pulled from the PWB
>with low pull forces and are failing in the field.
>
>I have examined multiple damaged PWBs and have found that in ALL cases
>the damage is the failure of the copper to epoxy bond.  A good PWB will
>normally fail within the laminate material.
>
>The units are built using Pb-free processes with Pb-free components.  I
>am trying to determine what can be done to show that the laminate is not
>good or in the PWB manufacturer did not laminage the layers correctly.
>I do not have easy access to bare PWBs that have not been processed.
>
>
>
>Any help or direction would be welcomed.
>
>
>
>Thanks,
>
>Mark
>
>mark
>
>Mark Woolley |PTRL Laboratory | Avaya | 1300 West 120th Ave |
>Westminster, CO 80234  USA |
>
>Voice (Lab): (303) 538-2166 | email: [log in to unmask] |
>
>
>
>
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