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May 2000

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Thu, 18 May 2000 09:47:15 EDT
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Hi Steve
I am going to assume that you are using IPC-6012 to a certain class to order
your boards.  One very specific action that I would advise you to do isask to
see the microsections from various past lots of boards produced.  Recently
I have been made aware of "less testing than the specs require" while still
issuing a CofC for 6012 compliance.  The sampling plans in the document
are in there to give you the minimum testing needed for each class of product.

This past month has been frustrating with comments like "oh, we run one
double sided board through our process each week and if that tests ok, we
know all the boards run are ok".  Of course the multilayers that were
certified
by this testing program had inner layer separation - which would have been
detected if appropriate microsections were examined.

Don't be wowed by equip and test plans.  Ask to see the actual test samples.

I apologize for being a little cynical for this early morning.
Susan Mansilla
Technical Director
Robisan Lab

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