| 摘要 |
There is provided a printed wiring board in which control of a characteristic impedance of a signal transmission pattern is realized with a small space and at a low cost, its manufacture is easy, a delay is hard to cause, and a high frequency signal can be stably transmitted. The printed wiring board (10) includes a flat plate base material (1), a signal transmission pattern (9) provided on at least one surface of the base material (1) for transmitting a high frequency signal, an insulator layer (11) formed to a constant thickness so as to cover the signal transmission pattern (9), and a control unit (13) provided on the insulator layer (11) so as to be opposite to the signal transmission pattern (9) and to be grounded, for controlling a characteristic impedance of the signal transmission pattern. <IMAGE> |
