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Mon, 14 Jan 2002 15:29:07 -0800 |
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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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