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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 "expess
> > 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, annular copper ring which is equal to a copper circle with a circular cutout, circular opening in solder mask.

Sometimes there is a need to do something a little bit different and in these cases possibility to draw on the needed layer including at least circular cut out in the form of a drilled hole is useful.


Nicklas Karlsson