US Patent 7137828 Reinforced flexible printed circuit board

A reinforced flexible printed circuit board (20) includes a conductive portion (21) and a connection portion (22). The conductive portion includes a first metallic wire layer (23) having a plurality of conductive metallic wires, and two first Insulation layers (24). The connection portion includes a second metallic wire layer (26) having a plurality of conductive metallic wires, two second insulation layers (27), and a reinforcement board (29) having a hand-grip portion (291). The reinforcement board is attached to one of the second insulation layers to reinforce the connection portion, and the hand-grip portion is positioned at an end of the reinforcement board so that it is convenient for workers to assemble the reinforced flexible printed circuit board to other components.