Patent ID: 8226438

Claim:
An electrical interconnection assembly having a printed circuit board, the printed circuit board comprising: a first side to which a first plurality daughtercards are electrically connected, each of the first plurality of daughtercards having a major plane such that the major planes of the first plurality of daughtercards are substantially parallel to each other and substantially orthogonal to a major plane of the printed circuit board; a second side, opposite the first side, to which a second plurality of daughtercards are electrically connected, each of the second plurality of daughtercards having a major plane such that the major planes of the second plurality of daughtercards are substantially parallel to each other and substantially orthogonal to the major plane of the printed circuit board, wherein the major planes of the first plurality of daughtercards are substantially orthogonal to the major planes of the second plurality of daughtercards; a first plurality of electrical connector assemblies electrically configured to electrically connect the printed circuit board to the first plurality of daughtercards; and a second plurality of electrical connector assemblies electrically configured to electrically connect the printed circuit board to the second plurality of daughtercards, wherein each of the first plurality of electrical connector assemblies comprise signal conductors arranged as differential pairs, and each of the second plurality of electrical connector assemblies comprise signal conductors arranged as differential pairs, wherein the printed circuit board comprises a plurality of vias extending from the first side to the second side, and wherein the plurality of vias comprises: a first plurality of signal conducting vias on the first side of the printed circuit board providing first signal launches for differential pairs of the first electrical connector assemblies; a second plurality of signal conducting vias on the second side of the printed circuit board providing second signal launches for differential pairs of the second electrical connector assemblies; a first plurality of ground connecting conductive vias on the first side of the printed circuit board providing first ground launches for differential pairs of the first electrical connector assemblies; and a second plurality of ground connecting conductive vias on the second side of the printed circuit board providing second ground launches for differential pairs of the second electrical connector assemblies.