1.FR-4 single side 1 layer pcb bare board. ... , SGS. ISO9001:2000. pcb PRODUCTION CAPABILITYLayers: 1-20 layersMaterial: FR-4, Aluminium Base, Rogers, Taconic, TeflonFinish Board Thickness: 0.2mm ... 20%of original artworkHole Diameter(H)PTH L:+/-0.075mm(3mil)Non-PTH L:+/-0.05mm(2mil)Outline Tolerance+/-0.15mm ... frequency,MCPCB,metal-backed PCB,welcome your enquiry. FR-4 single side 1 layer pcb bare board