On Wed, Mar 16, 2011 at 02:09:43AM -0700, Steven Michalske wrote: > Looking at the layers I would like to propose that the copper layer be > made not specific to copper, but a conductor. > Some common alternatives are silver ink traces, embedded resistors, or > even more exotics like ITO (used for touch screens). Ok. I will just rename it to 'conductive' layer. > > > For the footprints, > They should have a routing keepout, different than a placement > courtyard. That is don't rout on these layers in these regions. The 'countryard' layer should be exactly the keepout layer. Silk layer is used for normal visible spacing of the component. > > Pins and pads should have antipads that is when the pin goes through > a plane this antipad is the area in the plane that is cut out for the > pad on that layer. > High speed signals often have the ground plane under the pad removed > to minimize the capacitance/impedance change from the pad's greater > area. You can define more copper(now conductive) layers for one footprint. And some of them can be negative. The only problem to solve is to define some good mapping.
Martin Kupec _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user