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Date: Tue, 15 Jul 2014 20:58:32 +0200
From: Bernd Walter <ticso AT cicely7 DOT cicely DOT de>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] opper ring flag for vias and pins
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On Tue, Jul 15, 2014 at 10:59:07AM -0700, Dave Curtis wrote:
> On 07/15/2014 10:33 AM, Bernd Walter wrote:
> >Because I just remember this, while I wrote about holes and multilayer.
> >I would love to selectively switch of the copper ring per layer on
> >vias and pins.
> >The reason is that I only need to ring on solder side and on connecting
> >layers.
> >On layers I don't need the ring it just reduces space, especially
> >problematic with a via field e.g. inside a BGA.
> >It is not just routing space - the wider space between vias and pins
> >are preferable for groundplanes too.
> >
> So one thing I thought of that might help:
> Set the pad diameter on the Pin[] to the small diameter that you want on 
> the inner layers.  Larger pads cans be had on comp and solder side by 
> drawing coincident Pad[] elements with the same pin number.

This could work as a hack for most cases.
But there are oviously some drawbacks.
You can't have a copper ring in inner layers, but this is ok if you
connect to polygons with full copper contact only.
And by having pads on vias you need to add them to the netlist.

-- 
B.Walter <bernd AT bwct DOT de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.