yeah, just like Werner says Stevie,

Chuck Brummer
3M Manufacturing Engineer
8357 Canoga Ave.
Canoga Park, CA 91304-2605
(818) 734-4930




Werner Engelmaier <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
11/29/2006 12:13 PM
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Re: [TN] Delamination pics (IS410)






Hi Steve,
While the fault was clearly with you fab vendor, you are not totally off 
the 
hook either.
As a matter of routine, all fab batches should come with coupons, 
cross-sections, mandrel-plated ED copper foil samples together with 
tensile test results??
this would be even more imperative for expensive and critical assemblies, 
and 
for RoHS-soldering.
This is one of the strong recommendations in my White Paper: 
"Recommendations 
for PCB FAB Notes and Specifications in Printed Circuit Board Drawings for 

SnPb and Lead-Free Soldering Assemblies, the Qualification of PCB Shops 
and 
Activities to Assure Continued Quality," where both the steps for the 
"Qualification of PCB Shops" and for the "Activities to Assure Continued 
Quality" are 
listed.

Werner

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