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Date: | Thu, 12 Jan 2012 08:59:06 -0700 |
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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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