I spoke a bit too soon -- on my PCB it looks like pads & vias are treated
differently.  Vias use the pad size, and so exhibit the problem.  For free
pads, the pour leaves an area the shape of the pad (round, rectangular, or
octagonal), but uses the larger of the hole and pad size in each direction.
(Try a skinny rectangular pad, e.g., 1x50 with a 20mil hole.)

> -----Original Message-----
> From: Brad Velander [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, February 12, 2002 11:58 AM
>
> Thanks Dwight, that does make some sense. Seems I couldn't
> see the forest
> for the trees this morning.
>
> Sincerely,
> Brad Velander.
>
> -----Original Message-----
> From: Dwight [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, February 12, 2002 11:01 AM
>
> The (design rule) clearance is from the PAD, not the hole --
> so a 0-size pad
> won't leave the clearance you want.  The pad needs to match
> (or nearly) the
> hole size.

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