There are a variety forms of flexible printed circuit boards, even if it is a single sided structure, its covering film, reinforced plate material and shape, the process will change greatly. A seemingly simple single sided flex PCB may have more than 20 basic processes. Double-sided flexible PCB has two conductive layers, which can obtain higher package density. Double-sided flexible PCB is widely used in disk drives.
Double flexible PCB and flexible manufacturing method of the single panel there is a big difference, as shown in the following is ordinary have reinforced plate hole metallization double the gm of flexible printed circuit board manufacturing process:
Cutting a drill guide hole, hole metallization cleaning a resist coating on the surface of the copper foil a formation of conductive graphics etching, resist stripping a covering film of a terminal plating surface shape and hole machining a reinforced plate processing, check the packaging.