Patent ID: 7358843

Claim:
A noise rejection device comprising: a core comprising a first magnetic insulating material having a resonant frequency of permeability equal to or higher than 100 MHz; a resistance film formed on an outer peripheral face of the core from one end to the other end in an axial direction of the outer peripheral face; a spiral line segment and a corresponding spiral sulcus, each having a predetermined number of circumferences formed in the resistance film in an axial direction of the resistance film; an oxide film formed over a surface of at least a shoulder portion extending from a side to an upper surface of lines constituting the spiral line segment; an armor comprising a second magnetic insulating material having a dielectric constant smaller than that of the first magnetic insulating material, filling the spiral sulcus in the central part in the axial direction of the resistance film and covering a surface of the lines constituting the spiral line segment; and a pair of external electrodes formed in portions at both ends in the axial direction of the resistance film so as to sandwich the armor.