| 摘要 |
A printed wiring board wherein insulating layers and conductor circuits are alternately stacked and each conductor circuit has a rectangular cross section. In the printed wiring board, the relationship between an interval between the adjacent conductor circuits and a thickness (T) of the conductor circuit satisfies inequalities of 0.10T<=|W1-W2|<= 0.73T, where W1 is an interval on a conductor circuit upper side and W2 is an interval on a conductor circuit lower plane side. Thus, even when an IC to be driven at a high speed is mounted, cross talk and signal delay are suppressed and IC malfunction can be prevented. |
