... OEM membrane switches, FPC, silicon rubber, EL, touch screens and assemblies Specifications: 1) Min. trace width : 0.004"2 ... copper thickness): 0.5oz., 10oz. and 20oz. (RA and ED copper)7) Cover-layer: polyimide and polyester (solder mask printing is ... and polyimide 10) Surface finishes: flash gold plating, selective gold plating and solder plating Flexible Printed Circuit with Metal Dome and Mylar ...