Patent ID: 7265993

Claim:
A system, comprising: a printed circuit board; an integrated circuit device comprising a chip and a substrate, the chip being coupled to the substrate at a first level interconnect, the substrate being coupled to the printed circuit board at a second level interconnect; a power subsystem; a power distribution bus connecting the power subsystem to the integrated circuit device; and a filter portion comprising two or more dispersive contacts in at least one of the first or second level interconnects, each of the dispersive contacts being less electrically conductive in a first frequency range than in a second frequency range, the first frequency range being higher than the second frequency range, such that alternating current flowing through the dispersive contact between the integrated circuit device and the printed circuit board is reduced in the first frequency range relative to the second frequency range, wherein the filter portion is configured to reduce radiated emissions produced during operation of the integrated circuit by reducing current injected into the printed circuit board through the dispersive contacts in the first frequency range.