General specification for Flexible PCB Because of the advantages, such as: cost, space, and weight savings, flexible and Rigid-Flex-circuit board shave for some projects, they are used ever more frequently. Additionally, flex circuits can be screen printed silver circuits on polyester. Flexible electronic assemblies may be manufactured using identical components used for rigid printed circuit boards, allowing the board to conform to a desired shape, or to flex during its use. Multi FCB can produce your flexible circuit boards with the highest quality, either as prototypes or in series. For additional technical questions about flexible circuit boards, please contact us.