... factoryWe can provide you all lines of FPC, flex PCB, flex circuit, flex board, FPC board, FPC circuit, FPC assembly, we are professional ... (copper thickness): 13um~105um. (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: FR4, mylar and polyimide 10) Surface finishes: ENIG,Plated ...