Patent ID: 6560853
Filing Date: 2003-05-13
Classification: G11B,Y10T

Abstract:
A method of making a magnetic head that has a zero throat height (ZTH) where a first pole piece layer and a second pole piece first separate from one another after an air bearing surface (ABS) in a direction from the ABS toward a back gap, comprising:forming the first pole piece layer; forming the ZTH defining insulation layer on a first portion of the first pole piece layer; forming an insulation layer on the ZTH defining insulation layer and a first insulation layer on a second portion of the first pole piece layer; forming a coil layer on the first insulation layer; the ZTH defining insulation layer being located entirely between the coil layer and the ABS; forming at least a second insulation layer on the coil layer; forming the second pole piece over a front portion of a top surface of the ZTH defining insulation layer and on the second insulation layer, the ZTH defining insulation layer causing the second pole piece to separate from the first pole piece layer; and the step of forming the ZTH defining insulation layer providing the ZTH defining insulation layer with a thickness that positions a bottom surface of the coil layer closer with respect to a top surface of the first pole piece layer than the top surface of the ZTH defining insulation layer is with respect to the top surface of the first pole piece layer.