Perpendicular magnetic recording head

Claim 1

A perpendicular magnetic recording head comprising: a pole formed of a highly permeable magnetic thin film having one end thereof facing the magnetic surface of a recording medium; a side member formed of a highly permeable magnetic material jointed with one film surface of said pole, said pole protruding by a predetermined length from one end of said side member; a nonmagnetic holder means in contact with a surface of said thin film and in contact with a surface of said side member for holding said pole and said side member, an upper surface of said nonmagnetic holder means formed in a curved surface with the top portion of said curved surface being level with said one end of said pole; a coil hole formed in said nonmagnetic holder means on both sides of said jointed side member and pole, said hole gradually increases in width from said one end of said side member toward the other end of said side member in order to allow said predetermined length of said pole to be made substantially small and to maintain the mechanical strength of said nonmagnetic holder means, wherein the upper end surface of said coil hole formed by said gradually increasing width has an angle smaller than 50° with respect to a horizontal surface of said one end of said member; and an exciter coil wound around said pole and said side member through said coil hole.