> > As an FYI, pcb always uses round flashes for traces. A trace of width > > W has a corner with radius W/2 on the outside, not a sharp 90 degree > > Why W/2 and not W?
The diameter of the rounded ends of traces is W, to match the thickness. Therefor the radius is W/2. That's just the way it is at the moment; only square pins/pads and polygons have sharp corners. So, instead of the width "bump" being 1.414 at 90 degree corners, it's only 1.207 or so.
