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Date: | Thu, 9 Aug 2007 11:07:54 EDT |
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Hi Victor,
Criteria cannot be set, because "It Depends" (according to Doug Pauls) on too
many variables. These variables are in no particular order: barrel Cu
thickness, CTE(post-Tg) of laminate and B-stage layers, resin content (B-stage) Tg,
T reached above Tg, drilled hole diameter, surface land diameter, surface
land Cu thickness, PCB thickness, non-functional lands, dielectric spacing.
An actual assessment can only be done with FEA provided REAL properties are
being used (I have yet to see this).
Werner
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