Haalllooo, Technet!

	I'm (probably not alone in) facing pressures to setup non-
	symmetrical stackups, to accomodate the growing number of
	mixed 5v and 3.3v boards.

	I fully understand the unkind things that can happen when
	we're not distributing the negative layers well, but "how
	bad is bad?"  In the ~8x8" .062 world, is flexibility vis
	non-functional-copper (add/remove) enough to be reasonably
	certain of flat product?

	Would adding extra relief pads on the offending plane layer
	be beneficial?  How about a positive-image mesh?

	Does this become more critical with increasing overall size,
	as I'd expect?

	Am  I correct to worry about this, considering 1000s as a
	product life?

	Thanks in advance,
-- 
 
      Jeff Seeger                             Applied CAD Knowledge Inc
      Chief Technical Officer                      Tyngsboro, MA  01879
      jseeger "at" appliedcad "dot" com                    508 649 9800

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