kicad-developers team mailing list archive

[Rick Walker <walker@xxxxxxxxxxxxxx>]

> On 05.06.2014 02:48, Jean-Paul Louis wrote:
>
> I don't think it's possible for the moment. Defining custom via/pad 
> stacks is a quite big work package in itself and IMHO can be decoupled 
> from the layer extension WP. I'm not even sure if one can define a via 
> without antipads on internal layers (Lorenzo?)

Yes it is possible.  The footprint definition has a long int mask which
specifies the existance of a pad ring on each layer.  There is no GUI
support.  I had to write an awk script to generate my BGA footprints
textually, setting the hex value inside my generated footprint file. 

The design was tedious to do made it through fab just fine.
There was no other way to get the internal signals out of the
high density BGA footprint except by leaving off internal annular
rings on some layers.

--
Rick Walker