In a message dated 2/13/2011 8:37:05 P.M. Central Standard Time,
cs6061@... writes:
Sealing is not the issue, I want something low cost I can drill into as
the bit comes through the board on the back side. Don't want to drill into my
vacuum table surface.<<
I always use a layer of old, maybe drilled, "junk" FR-4. Some may say
this does not provide proper backing if a HOLE is encountered, but I never
found this to be a problem
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