... /100um)Thickness of inner copper1/3oz,1/2oz,1oz,2oz,3ozThickness of finished panel0.2-4.0mmTolerance of finished panel thicknessThickness< 0 ... hole0.20mmMin drilling diameter0.20mmThickness of solder maskLine end 0.4-1.2milLine comer ≥0.2milHardness of solder mask6HMin solder mask dam4 ... free,gold finger,OSP,silver,goldType of ccl materialFR-4,AL,CEM-1,CEM-3,TG 180 We offer quick turn pcb ...