... ,high quality multilayer printed circuit board *Base material: FR-4 *Copper thickness: 0.5-2.0 oz*Thickness: 0. ... /2oz,1oz,2oz,3ozThickness of finished panel0.2-4.0mmTolerance of finished panel thicknessThickness< 0.5mm ... drilling diameter0.20mmThickness of solder maskLine end 0.4-1.2milLine comer ≥0.2milHardness of solder ... free,gold finger,OSP,silver,goldType of ccl materialFR-4,AL,CEM-1,CEM-3,TG 180 ...