Patent ID: 7125743
Filing Date: 2006-10-24
Classification: H01L

Abstract:
1. The method of reducing electromagnetic interference generated within an integrated circuit device package wherein the integrated circuit device package comprises a wafer having wafer circuitry disposed thereon; a plurality of conductors defining electrically conductive paths for carrying the electric current flowing to and from the wafer circuitry; and a structure that encapsulates and supports the wafer, said structure comprises an encapsulating medium; said method comprising introducing into the encapsulating medium a powder composed of ferrite magnetic material that exhibits a hysteresis loss, in the vicinity of at least one of the electrically conductive paths such that the ferrite magnetic material does not itself prevent bending of the at least one of the electrically conductive paths, but serves to attenuate the highest frequency signal components while introducing generally little inductance effects of overshoot and ringing associated with the series inductance of the at least one of the electrically conductive paths.