Patent ID: 7292452
Filing Date: 2007-11-06
Classification: H05K,Y10T

Abstract:
1. An apparatus, comprising: a dielectric layer; a pair of traces disposed in the dielectric layer; a first reference layer disposed on a first side of the dielectric layer, the first reference layer including a first plurality of openings having at least a first subset disposed in a breakout region and a second subset disposed in another region, the diameter of the first subset of the first plurality of openings in the breakout region is smaller than the diameter of the second subset of first plurality of openings in the another region; and a second reference layer disposed on a second side of the dielectric layer, the second reference layer including a second plurality of openings, the first plurality of openings arranged in a substantially alternating manner with respect to the second plurality of openings, the first and second plurality of openings adapted, based at least in part on a predetermined width and a predetermined spacing of the pair of traces, to contribute in achieving substantially a particular differential impedance.