NPTH - Copper Pullback and Soldermask Expansion

Suggested Design Rules for Non Plated Thru Holes (NPTH)  

Clearance Rule for Copper Pull Back from Hole Edge

Clearance_NPTH

(AsMM(HoleDiameter) > 0 ) AND (PadIsPlated = 'False') 

Minimum Clearance = 0.25mm (10mils)

Soldermask Expansion Rule:   

SolderMaskExpansion_NPTH

(AsMM(HoleDiameter) > 0 ) AND (PadIsPlated = 'False') 

Expansion = 0.125mm (5mils)

(AsMils(HoleDiameter) > 0 ) AND (PadIsPlated = 'False')