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Looks like measles. Logical criteria is that 1; no propagation after thermal stress and 2; no reduction of spacing to uncommon conductors. Connected measles will generally indicate a propensity for propagation.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Juan T. Marugán
Sent: Wednesday, January 10, 2007 7:07 AM
To: [log in to unmask]
Subject: [TN] PCB's: White spots
In some PCB's we have detected white spots. Although I think these spots are
not due to a delamination and the boards should be acceptable, I'd like to
have your assessment.
Thank you in advance,
Juan T. Marugán López
Production QA
Indra Sistemas SA - Madrid (SPAIN)
www.indra.es
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