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	Wed, 27 Jan 2016 00:17:51 -0800 (PST)
Date:	Wed, 27 Jan 2016 09:17:46 +0100
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Subject:	Re: [geda-user] The nature of gEDA users
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> >> > But the first steps should not be "implement b/b vias" or "allow more
> >> > than one pair of outer layers".  It should be something like "express
> >> > Elements and Vias as subclasses of generic containers that can include
> >> > anything".
> >> 
> >> +1
> >> 
> >> John Doty              Noqsi Aerospace, Ltd.
> >> http://www.noqsi.com/
> >> jpd AT noqsi DOT com
> >
> > I am probably on same track. A via or hole is: drilled cut out thru
> > all layers with plating
> 
> No.  A via is a collection of circles, negative circles, thermals on
> conductive layers, and a circle on a layer connecting the copper circles.
> 
> The technology and DRC ruleset knows that the circles shall be drilled
> at slightly larger diameter and filled with plating, and check the
> copper circles accordingly.  But that is several orders up in the
> abstractions stack.
> 
> -- 
> Stephan

I got slightly wrong and would only add the circle connecting the copper circles really is a cut out or negative circle as you call it.

I assume the following objects are equal and give the same result: drilled hole, negative object, cut out.

To drill a hole thru only some of the layers I consider a little bit more involved. If I got objects wrong is less important. Do you think it would be good with possibility to draw on any layer inside element, pin, via, pad for those special cases that are a little bit different?


Nicklas Karlsson

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