If you're talking about a Class 2 board, .010" over would be good, but for
Class 3, there's a 0.001" annular ring requirement.  Because of that, you
should increase to 0.012".

You'll find a good series of e-mails on the benefits and detractions of
leaving unused pads in the board in the Technet archives from Feb 1999.

> ----------
> From:         Stephen Gregory[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.
> Sent:         Friday, January 11, 2002 5:55 PM
> To:   [log in to unmask]
> Subject:      Re: [TN] Remove unused "dead" pads on internal layers
>
> Hi again Pat,
>
> That sounds okay to me, within the the tolerances that are spec'd out for
> drilling, right?
>
> What I can do is look at the gerbers for the board that I was talking
> about in my case, and do a quick check to see what the diameter was on
> those pads...but can't do that until Monday.
>
> -Steve Gregory-
>
>
>
>
>       Thanks Steve,
>
>       Would 0.010" over the finished hole size be good pad size to be used
> on internal
>       layers?
>
>       Thanks,
>       Pat
>
>
>
>
>

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