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Date: Wed, 6 Jan 2016 14:54:28 +0100
From: "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] A fileformat library (blind/buried vias)
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> For this pcb non-user, one of the biggest sources of confusion that drives me away is that pcb does not really have layers at its foundation.
> 
> I think of a printed circuit board as a stack of patterned layers of various materials: epoxy glass, constantan, copper, teflon, solder mask, etc. Plated holes are an exception to the general paradigm, but I think they’re the only one unless you’re into 3D printing.
> 
> From that point of view, a simple buried via is a piece of copper with a hole in it on one layer, a plated hole in the insulating layer below it, and a piece of copper with a hole in it on the next layer down. ...


I think of layout data as a bunch on drawing primitives drawn on different layers, everything else is just structure to make handling easier.

Some data or drawing primitives are bunched together in something called a footprint so it could be manipulated all at once.

If it where possible to bunch together the ordinary drawing primitives including drilled plated or not holes in something called a via it would be no problem to draw buried vias?


Nicklas Karlsson