In PADS Layout, I want to set via-to-copper clearance to 8 mils and drill-to-copper clearance to 10.5 mils.
But when I do this, when copper flooding the planes, around the vias the copper stays 10.5 mils away.
Why is via-to-copper clearance allowed to be overruled by drill-to-copper clearance? What then is the purpose of via-to-copper clearance? Is there a time when the via-to-copper clearance is expected to be larger than the drill-to-copper clearance? I have never seen that happen.
What I was thinking is it would be nice just to have via-to-copper clearance apply to vias, and drill-to-copper clearance apply to all other drilled holes. And to distinguish clearance for non-plated holes from plated holes, drill oversize would apply to plated holes except for vias.
Or is there another way to do what I'm trying to do?