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Date:	Wed, 16 Jul 2014 14:22:50 -0400
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From:	DJ Delorie <dj AT delorie DOT com>
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Subject:	Re: [geda-user] opper ring flag for vias and pins
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> You need to be able to remove inner layer pad annuli completely for 
> signal integrity reasons on some high-speed lines.

Aren't there manufacturability issues if you do that?  I.e. voids
where the copper should be, causing breaks in the barrel?

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