| 摘要 |
PROBLEM TO BE SOLVED: To provide a noise rejection device which can stably acquire a noise rejection effect in a wide frequency band by one device. SOLUTION: The device 10 includes two square pole parts 11a symmetrically with both ends, and includes a columnar core 11 made of a first magnetic insulation material having a columnar part 11b having a smaller profile than the square pole part 11a among the two square pole parts 11a, a resistor film 12 formed by almost uniform thickness so that the peripheral surface of the columnar core 11 is covered, a spiral line part 12a having the number of predetermined circumference formed by performing laser trimming processing of the spiral groove 12b in the part existing on the columnar part 11b of the conductor film 12, an oxide film DR formed so that the front surface of a shoulder from the side face of the line for constituting the spiral line part 12a, a sheathing 13 covering the surface of the part existing in the columnar part 11b of the resistor film 12 and made of a second magnetic insulating material formed so that the appearance shape becomes a square pole state, and a pair of external electrodes 14 formed by almost uniform thickness so that the front surface of the part existing on the end face and four side faces of the square pole part 11a of the conductor film 12 may be covered. COPYRIGHT: (C)2006,JPO&NCIPI
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