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via-to-copper clearance overruled by drill-to-copper clearance

Question asked by pmyg10 on Nov 8, 2017
Latest reply on Nov 10, 2017 by wcowles2

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?