... SGS. ISO9001:2000. pcb PRODUCTION CAPABILITYLayers: 1-20 layersMaterial: FR-4, Aluminium Base, Rogers, Taconic, TeflonFinish Board Thickness: 0.2mm-3 ... Peelable Blue Gum; Immersion Gold+ OSP. ItemSpecificationsNumber of Layer1-12LayersMaterialFR-4, AL PCB, CEM-1, Taconic, RogersFinish Board Thickness0.2mm-3 ... frequency,MCPCB,metal-backed PCB,welcome your enquiry. FR-4 single side 1 layer pcb bare board