| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring board which can accurately propagates the prescribed signal to a signal wiring conductor and a signal penetrating conductor without generating large reaction on the signal which propagates to the signal wiring conductor and the signal penetrating conductor, and normally operate the electric parts such as the semiconductor element, etc., to be counted. SOLUTION: This wiring board is provided with a first insulating layer 1, a first signal wiring conductor 4 on the upper surface of the first insulating layer 1, a second signal wiring conductor 5 on the lower surface of the first insulating layer 1, a signal penetrating conductor 6 with which the first signal wiring conductor 4 and the second signal wiring conductor 5 are connected, a second insulating layer 2 on the upper surface of the first insulting layer 1, a third insulating layer 3 on the lower surface on the first insulating layer 1, a first grounding conductor layer 7 on the upper surface of the second insulating layer 2, a second grounding conductor layer 8 on the upper surface on the third insulating layer 3, and a grounding penetrating conductor 9, which is arranged adjacent to the signal penetrating conductor 6 and connected to the first and the second grounding conductor layers 7 and 8 penetrating from the first to the third insulating layers 1 to 3. Apertures 7a and 8a, having the area larger than the cross-sectional area of the signal penetrating conductor 6, are formed on the region opposing to the signal penetrating conductor 6 and the first and the second grounding conductor layers 7 and 8.
|
