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January 2012

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From:
"Woolley, Mark D. (Mark)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Woolley, Mark D. (Mark)
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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