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Tue, 01 Oct 1996 15:07:27 -0400 |
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| From [log in to unmask] Tue Oct 1 17: |
02:12 1996 |
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by ipc.org (Smail3.1.28.1 #2)
id m0v89kn-0000XFC; Tue, 1 Oct 96 13:41 CDT |
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We have been experiencing sporadic cracks in plated copper but don't know
where they come from. The problem is that after LPI they look like a break
through the whole trace. After microsectioning many of these we have found
that it never goes through the base copper - only plated copper. Has anyone
experienced this and if so what causes this and how is it corrected?
Thanks,
Jim
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