Patent ID: 7518248

Claim:
An inductive filter comprising: a substrate; a series of plated through hole (PTH) vias formed in the substrate between a first conductive layer and a second conductive layer, wherein the first conductive layer and the second conductive layer are separated by one or more dielectric layers of the substrate; conductive material traces within the first conductive layer and the second conductive layer that electrically connect the PTH vias, wherein adjacent PTH vias are electrically connected by a trace on either the first conductive layer or the second conductive layer, and wherein the adjacent PTH vias in the series alternate between being electrically connected by a trace on the first conductive layer or electrically connected by a trace on the second conductive layer; at least one additional series of PTH vias formed in the substrate; and additional conductive material traces in the first conductive layer and the second conductive layer that electrically connect the PTH vias in each of the at least one additional series, wherein adjacent PTH vias in the at least one additional series alternate between being electrically connected by traces on the first conductive layer or the second conductive layer.