| 摘要 |
PROBLEM TO BE SOLVED: To provide a multiplayer printer-wiring board in which standing waves and reflection are not generated. SOLUTION: A field via 360 which passes interlayer insulating layers 144, 244 is arranged just above a coaxial through hole 66. An interconnection is not drawn in a direction parallel to the printed-wiring board. As a result, the standing waves and the reflection are not produced in the through hole 66 and the field via 360, and the electrical characteristic of the multiplayer printer- wiring board can be increased. |
