Patent ID: 7292120

Claim:
A nonreciprocal circuit device comprising: a center electrode assembly including a ferrite, a plurality of center electrodes and a plurality of insulating films defining a multilayer structure provided on a surface of the ferrite, and a plurality of side electrodes provided on side surfaces of the ferrite; wherein each end portion of each of the plurality of center electrodes provided on the surface of the ferrite has a thickness greater than the thickness of the other portions of each of the plurality of center electrodes, and each thicker end portion of each of the plurality of center electrodes is connected to a corresponding side electrode; each thicker end portion of each of the plurality of center electrodes is made of a conductive material filled in a corresponding one of a plurality of openings provided in peripheral portions of the insulating films; the thickness of each end portion of the center electrode in a bottom layer of the multilayer structure on the surface of the ferrite is increased by a conductive material filled in a corresponding one of the plurality of openings formed in the insulating films on an upper surface of the end portion; and the thickness of each end portion of the plurality of center electrodes in a top layer of the multilayer structure on the surface of the ferrite is increased by a conductive material filled in a corresponding one of the plurality of openings formed in the insulating films on a lower surface of the end portion.