Specifications: 1) Min. trace width : 0.004" 2) Min. space between trace: 0.004" 3) Min. hole size: 0.012" 4) Thickness tolerance: a) Single sided: 0.005" b) Double sided: 0.010" 5) Base materials: polyimide and polyester 6) Conductor (copper thickness): 0.5oz., 10oz. and 20oz. (RA and ED copper) 7) Cover-layer: polyimide and polyester (solder mask printing is available) 8) Adhesive material: epoxy, acrylic and polyester 9) Stiffener materials: FR-4, mylar and polyimide 10) Surface finishes: flash gold plating, selective gold plating and solder plating