Chris,
I think your picture shows an "E" crack and the initial plating
has separated from the copper that was subsequently plated. Is that
solder in the area where the platings are separated?
Thanks,
Lance
From:
Chris Mahanna <[log in to unmask]>
To:
[log in to unmask]
Date:
08/16/2010 10:21 AM
Subject:
[IPC-600-6012] opinion poll
Sent by:
IPC-600-6012 <[log in to unmask]>
Hi Everyone,
Attached is a picture of a thru-hole corner after thermal stress. The
plating is pulse. I believe the corner was 'burnt' because of the
geometry of the (conformant) negative etchback. All the corners show
burn; some show blisters; only this one cracked.
In your opinion, what are the non-conformance(s) if any?
Thanks
Chris
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