On Sun, Sep 7, 2014 at 1:19 PM, wrote: > I suspect that you will find free/low priced/hobby packages have layer > limitations because the underlying code to keep track of everything on > each layer becomes a big mess if not well designed. Once to get to > 'serious' packages that cost significant money you can do anything with > them from laying out silicon for ICs to multilayer PCBs where > manufacturing technology of the boards sets the maximum layer limits. While I agree commercial software is much better suited for doing 12 layers= , I know for a fact the gEDA supports an unlimited number of routing layers. It is controlled by a compile time variable that is set to 8 by default. Unfortunately, it does not support blind vias, which I have to imagine is a show stopper on high layer count boards. I don't know how it is for KiCad, but I have to imagine that it is a simila= r story. --=20 Jason White --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .