Thad, While 0.01" is a good number for an absolute minimum, a good number for "typical recommended minimum" for high volume multilayer boards is 0.025" This number should be increased if scoring is specified as the means of depanelization/tab removal. Routing or punching through holes is not recommended. (Although specialized plating/hard tooling has yielded acceptable half-barrels. Remember the Datakey dies, Joe F.?) Mark Orzech [log in to unmask] Does anyone have any comments regarding how close a plated or non-plated hole can be to the routed edge of a PCB. What is the typical recommended minimum. I've been told that a plated via and associated copper can be down to .010" to a routed edge. I have personal concerns about how close a via can be before the routing process may damage a via. Additionally the slop associated with the routed edge location. I'd appreciate any feedback. Thanks, [log in to unmask]