Patent ID: 6812803
Filing Date: 2004-11-02
Classification: H05K

Abstract:
An electrical router backplane comprising:multiple high-speed signaling layers, each high-speed signaling layer comprising a plurality of high-speed differential trace pairs sandwiched between layers of a dielectric material, each trace having a conductive pad at each end; a plurality of conductive planes, including a plurality of ground planes interposed respectively between the high-speed signaling layers, at least one plane having a first conductive pad with a first clearance separating that pad from the remainder of the plane, that pad in substantial alignment, viewed normal to that plane, with a corresponding differential trace conductive pad on one of the high-speed signaling layers; and a first signaling thru-hole having a conductive liner and passing through the first conductive pad and the corresponding differential trace conductive pad, the conductive liner electrically connected to both of those pads.