Patent ID: 7319369

Claim:
A non-reciprocal circuit element comprising: a permanent magnet; a ferrite that receives a direct-current magnetic field from the permanent magnet; a plurality of center electrodes disposed on the ferrite; a circuit substrate having terminal electrodes on front and back surfaces thereof; and a yoke surrounding the permanent magnet and the ferrite on the circuit substrate; wherein the center electrodes on the ferrite include conductive film; the surfaces of the circuit substrate is substantially rectangular; the terminal electrodes include a terminal electrode provided on the front surface and an external-connection terminal electrode provided on the back surface; the permanent magnet and the ferrite are disposed on the front surface of the circuit substrate, the permanent magnet and the ferrite having principal surfaces, respectively, that face each other and are substantially perpendicular to the front surface of the circuit substrate, and having longitudinal sides that are substantially parallel to longitudinal edges of the circuit substrate; and a surface of the ferrite that faces the circuit substrate is provided with a connector electrode, the connector electrode being electrically and mechanically connected to the terminal electrode provided on the front surface of the circuit substrate.