... to hole/to pad Tolerance±0.05mm/±0.2mm Solder Mask Pad no Open soldermask must cover all on both side ... hole on both side Solder Mask Thickness0.7mil,raised H≤0.05Colour green,blue,red,yellow,black,white(LPI/MATT.,UL 94 ... V0 approved) Surface Finish HALtin height≤0.05mmENIGNickel 3-7um,gold:0.5-0 ... ,ROHS,UL, Welcome to visit WALBOND ! 4L PCB with BGA and gold finger