NON-REVERSIBLE CIRCUIT ELEMENT AND METHOD OF MANUFACTURING IT

摘要

Provided is a non-reversible circuit element which has a simple structure and excellent electric characteristics and which can be easily manufactured; and a method of manufacturing the non-reversible circuit element. This non-reversible circuit element (two-port type isolator) comprises a permanent magnet (41), a ferrite (32) to which a direct current magnetic field is applied by the permanent magnet (41), first and second center electrodes disposed in the ferrite (32), and a circuit board (20). A ferrite-magnet assembly (30) mounted on the circuit board (20) is covered by a resin layer (10). The resin layer (10) comprises an innermost layer (11) made of a non-magnetic resin material and a magnetic resin layer (12) in which a filler with magnetism is mixed.