If you're looking for an epiphany, I guess burnt offerings are a good
start.
Dewey

-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Chris
Mahanna
Sent: Monday, August 16, 2010 10:41 AM
To: [log in to unmask]
Subject: Re: [IPC-600-6012] opinion poll

Hi Lance,
No solder
Let me add another picture to the story.

-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Lance A
Auer
Sent: Monday, August 16, 2010 1:35 PM
To: [log in to unmask]
Subject: Re: [IPC-600-6012] opinion poll

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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