Patent ID: 8120927

Claim:
A printed circuit board, comprising: a substrate having a top surface and a bottom surface; a ground plane on the bottom surface; pads used for connections between the printed circuit board and a semiconductor chip package on the top surface; a signal trace on the top surface along a first direction, wherein the signal trace connects to one of the pads; at least two isolated power planes on the top surface adjacent to opposite sides of the signal trace, respectively, wherein one of the two power planes connects to another one of the pads, and another one of the two power planes averts directly connect to any one of the pads; and a conductive connection along a second direction coupled to the two power planes for power transmissions between the another one of the two power planes, which averts directly connect to any one of the pads, and the another one of the pads, across the signal trace without electrically connecting to the signal trace, wherein the signal trace doesn't pass over any split of the ground plane.