Patent ID: 8957325
Filing Date: 2015-02-17
Classification: G06F,H05K,Y10T

Abstract:
1. A printed circuit board comprising: a first ground reference layer; a second ground reference layer; a via cutout on the first ground reference layer, the geometry of the via cutout selected to provide an extension region extending in the direction of a differential trace, a first differential trace, the first differential trace adjacent a first ground reference layer and a second ground reference layer, wherein a spacing of the first differential trace in the extension region is different from a spacing of the first differential trace outside the extension region; a second differential trace; the second differential trace adjacent the second ground reference layer; and a first via cutout and a second via cutout on the second ground reference layer, a radial dimension of the first via cutout and the second via cutout selected such that the second ground reference layer remains intact in the area adjacent the second differential trace.