I have a PCB manufacturer requesting a waiver for the MIL SPEC requirement
of a 2 mil annular ring.  Their position is that the coupons are from the
edge of the laminate where the registration is worse.  The assumption is
that the ring will be larger in the PCB itself.  I am leery to grant a
waiver to allow this deviation, but would like to know how the community
feels about this.

Bruce Stilmack
GDLS-TO Manufacturing Engineer
(850) 574-4773
[log in to unmask]

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