These meanings are suitable for manufacturing PCB almost at any factory with an accuracy class not below 5.ZmGor said:Typical values for the majority of factories.
The relation of diameter of a drill to thickness of the PCB: ~1/6
Minimal diameter of a drill via: Dmin = 0.3 mm
Contact platform of via: Dmin + 0.4 mm
Clearing in a ground plane: Dmin + 0.9 mm