Patent ID: 6400527
Filing Date: 2002-06-04
Classification: G11B

Abstract:
A thin film magnetic head comprising:a lower core layer of a magnetic material; a gap layer of a nonmagnetic material formed on top of said lower core layer; a first insulation layer formed on top of said gap layer and having a first sloping region defining a first apex, said first apex being located on a surface facing a magnetic recording medium and defining a gap depth, said first sloping region includes an upper area adjacent to said first apex; a coil layer formed on said first insulation layer and being located at a first distance from said first apex; a second insulation layer laminated on said first insulation layer so as to cover said coil layer, said second insulation layer having a second sloping region defining a second apex, said second apex being located on the surface facing the magnetic recording medium at a second distance from said first apex, said second sloping region includes an upper area adjacent to said second apex; a third insulation layer formed on said first insulation layer in a bared area between said first and second apexes, said third insulation layer having an inclined plane sloping upwardly, at an angle less than 45Â° with respect to the top of said gap layer, said inclined plane gently connecting the upper area of the first sloping region and the upper area of the second sloping region; and an upper core layer of a magnetic material having a tip region, a connecting portion and a body portion, said tip region being located on a surface facing the magnetic recording medium and establishing a magnetic gap via said gap layer, said body portion being formed on top of said second and third insulation layers and having a back end region being in contact with said lower core layer, and said connecting portion connecting between said tip region and said body portion, and being formed on top of said first and third insulation layers.