Patent ID: 8552308
Filing Date: 2013-10-08
Classification: H05K

Abstract:
1. A differential signal pair transmission structure adapted to be disposed on a wiring board and transmit a differential signal pair, the wiring board including a circuit stack and the circuit stack comprising an upper surface and a lower surface opposing the upper surface, the differential signal pair transmission structure comprising: a first signal path used to transmit one of the differential signal pair, the first signal path comprising: a second signal path used to transmit the other of the differential signal pair, the second signal path comprising: wherein a portion of the first signal path and a portion of the second signal path overlap in the normal projection onto the upper surface, and the normal projection of the first signal path and the normal projection of the second signal path projecting onto the upper surface are substantially symmetric with respect to a line which is perpendicular to a segment connecting the normal projection of axis of the first through via and the normal projection of axis of the second through via onto the upper surface and passes through the midpoint of the segment.