Spehro Pefhany wrote:
> Olin:  When you spec a hole as "unplated" in the PCB layout program,
> how does that information get passed to the PCB maker (given just
> Gerber and Excellon files)?

I don't know.  I don't specify holes are plated or unplated explicitly in
Eagle, and there seems to be nothing added to the drill file to indicate
this either way.  I think the board house is looking at whether copper is
running to the hole to decide if I might intend it to be plated or not.

By the way, other board houses plate all holes without the silly fuss.  I
just looked at a board I had done by Advanced Circuits a few months ago, and
all the holes, whether copper running to them or not, are plated on the
inside.  I never considered this a big deal as long as the resulting hole
diameter is within tolerance.  If I don't run traces to the hole, then the
metal lining the inside of the hole won't be connected to anything, so it
won't make any difference except in very rare cases (which I have never
personally run into).


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