Patent ID: 6275354
Filing Date: 2001-08-14
Classification: B82Y,G11B

Abstract:
A magnetic head comprising:a substrate having a major surface and an air bearing surface disposed perpendicular to said major surface;first and second yoke layers formed parallel to each other and of high magnetic moment material disposed over said major surface of said substrate;first and second pole tip layers with aligned sidewalls, said pole tip layers being planar with said yoke layers respectively and having lengths extending from said first and second yoke layers respectively to said air bearing surface;a toroidal coil assembly encompassing only one of said yoke layers, wherein said toroidal coil includes a plurality of coil windings defining a coil axis which is coincident with said encompassed yoke layer;wherein each of said yoke layers is characterized by a completely flat geometry with a level cross-sectional profile;wherein the cross-sectional area of the first yoke layer is greater than that of said second yoke layer;including a read transducer formed with the magnetic head;wherein said second yoke layer is formed with a nose section having a length extending from one end from said air bearing surface to an inflection point located at a second end of said nose section at which said second yoke layer diverges and the nose length of the nose section is greater than the length of said pole tip layers; andwherein said magnetic head has a low inductance enabling processing of high frequency data signals with high data areal density.