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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] (draw on insulating layers, gerber clear polarity)
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> > So clear polarity in gerber files does not work properly?
> 
> I'm going to say "it depends" here.  There are things that you think
> you can do in gerber using layer polarities, that fabs will get wrong.
> We chose to solve the problem (and/or ambiguity) by avoiding polarity
> completely.  We do all the pos/neg/pos math inside pcb and spit out
> only the results.
> 
> Whether to blame the gerber spec, or lazy software at the fabs, is up
> to you :-)

Even though polarity does not work properly in gerbv and have to worked around it make sense in pcb/gpcb with cutout or clear polarity to "remove" material.

I thought about emdedded components and with a cut out of a certain height it could be used for the court yard and for embedded components. Whenever it reach a layer it would make a cut out in that layer.

I would say cut out in board layout would make sense although as is now board outline is drawn as a line so there really is nothing to cut from. It have to made from a solid shape, then a cut out could be made.


Nicklas Karlsson