Semi-worked synthetic plastics and foils in the form of coated copper foils, films, copper foil laminated films and sheets, polyimide films and sheets for use in the manufacture of circuit boards, multilayer circuit boards, printed wiring boards and printed circuits as components for: telecommunication fiber-optic transceivers, fiber-optic repeaters, converters and optimizers, wave division multiplexers; Ethernet switches and routers, fiber-to-the-home and ethernet-over-VDSL access aggregator...