Patent ID: 6061212
Filing Date: 2000-05-09
Classification: G11B,Y10T

Abstract:
A magnetic head, comprising:a pair of magnetic cores each having a convexly processed part, said convexly processed parts being disposed opposite to each other with a magnetic gap member inserted therebetween to form concave regions on opposite sides of said magnetic gap member, each of said concave regions having a generally continuous concave surface; anda pair of glass blocks disposed in said concave regions on both sides of said pair of magnetic cores, thereby coupling together said pair of magnetic cores,wherein a magnetic film is formed at least on a projection end face of said convexly processed part of each of said pair of magnetic cores; anda pair of notches regulating a track width on a magnetic tape sliding face of said pair of magnetic cores are each formed by electric discharge machining at a respective one of the concave surfaces so as to flank a butted part of said convexly processed parts of said pair of magnetic cores from both sides, said pair of notches being circular in shape and forming magnetic gap defining further concave regions extending inwardly beyond the respective concave surfaces towards one another such that an interface thereof is not positioned out of an edge of a recording pattern on a magnetic tape when said magnetic tape travels; andfurther wherein a respective tangent to an arc of each of said notches at an intersection point of a magnetic gap and said arc is substantially parallel with a direction of travel of said magnetic tape, and said magnetic tape travels at an inclined angle relative to a direction normal to a direction of said magnetic gap between said intersection points, andan antireaction film is provided at least between said pair of notches and said pair of glass blocks across respective sides of a magnetic gap existing between said pair of notches with said magnetic gap member inserted therein, said antireaction film remaining along the further concave regions.