Determine whether a result with an area of only a few square db units is worth keeping.
If not then remove small shapes from the output layer by adding an AREA filter after the boolean.
Assume that the output from the following AND occasional produces unwanted results that are less than 2 sq. db.
PADO = AND PAD2 METAL4
PADO_SMOOTHED = AREA PADO > .000002 // eliminate small errors, under a couple square nm.