Patent ID: 7145331
Filing Date: 2006-12-05
Classification: G01R,G11B,Y10T

Abstract:
1. A magnetic sensor comprising: a first strip-shaped soft magnetic film formed on a nonmagnetic substrate; an insulation layer formed on a part of said first strip-shaped soft magnetic film; a second strip-shaped soft magnetic film for forming a closed magnetic path together with said first strip-shaped soft magnetic film, said second strip-shaped soft magnetic film being formed on said insulation layer and said first strip-shaped soft magnetic film; a conductive film formed to pass through the closed magnetic path so as to be electrically insulated from said first and second strip-shaped soft magnetic films; a conductive nonmagnetic film formed to pass through the closed magnetic path so as to be electrically insulated from said first and second strip-shaped soft magnetic films and said conductive film; a direct current power source for applying a direct current to said conductive film so as to apply a direct current bias magnetic field to the closed magnetic path; and a high frequency power source for applying a high frequency current to said conductive nonmagnetic film.