... send us RFQ! This form is of my company's process capacity for your reference, for more messages, pls ... layer,double layer,multi-layer(4-10)Board Thickness0.3mm-3.0mm,+/-0.1mm(tolerance)Copper Thickness1/2OZ-3OZ (35um ... ) Surface Finish HALtin height≤0.05mmENIGNickel 3-7um,gold:0.5-0.7umOSP/flash gold 0.2-0.5umPealable maskcover all on pad ... ,ROHS,UL, Welcome to visit WALBOND ! Multilayer dvr PCB board