| 摘要 |
A wired circuit board that can control characteristic impedance at connection points between wires of a suspension board with circuit and terminal portions of the wired circuit board connected thereto with a simple structure, to improve signal transmission efficiency even for fine pitch wiring or for high frequency signal. To provide this wired circuit board, a relay flexible wiring circuit board 1 is formed by a first wired circuit board 14 comprising a first metal substrate 16, a first insulating base layer 17, a first conductor layer 18 and a first insulating cover layer 19 which is substantially identical in layer structure with the suspension board with circuit 3 and a second wired circuit board 15 connected with the first wired circuit board 14 for connecting with a control circuit board 4. In this wired circuit board, since the suspension board with circuit 3 and the first wired circuit board 14 are rendered substantially identical in layer structure with each other, both characteristic impedances at these connection points can be matched with each other. |
