Printed circuit board with low cross-talk noise

摘要

A printed circuit board (10) and a method of making same in which the board includes a common power plane (11) having dielectric layers (19, 23) on opposing sides thereof and a signal layer (21, 25) on each of said dielectric layers (19, 23), each signal layer comprising a plurality of substantially parallel signal lines (22, 27) running in substantially similar directions across said signal layers (21, 25). Predetermined portions of the signal lines (22, 27) in one signal layer are aligned relative to and also parallel to corresponding signal lines in the other signal layer, with the power plane (11) being located between these portions. Through hole connections are provided between selected signal lines in the two layers, these occurring through clearance holes (13) in the power plane (11) so as to be isolated therefrom.