Patent ID: 7092206

Claim:
A magnetic write head comprising a magnetic write structure having an ABS end thereof, the magnetic write structure comprising: A first magnetic layer having a first pole at the ABS end thereof; A second magnetic layer having a second pole at the ABS end thereof, the second pole being spaced apart from the first pole and having a second-pole width; A third magnetic layer formed indenendently of the second pole and having a third pole at the ABS end thereof, the third pole contacting the second pole and having a third-pole width greater than the second-pole width so that the second magnetic layer and the third magnetic layer taken together have a T-shape when viewed from the ABS end; and An inductive coil disposed adjacent to and in registry with the third magnetic layer at a coil-registry location remote from the third pole, a plane of the third magnetic layer defined between the third pole and a buried portion of the third magnetic layer passing through the inductive coil, wherein the third magnetic layer is nonuniformly thick such that a thickness of the third pole is less than a thickness of the third magnetic layer along all points of the coil-registry location, wherein: The inductive coil is substantially planar and lies in an inductive-coil plane; The first magnetic layer is substantially planar and lies in a first-magnetic layer plane parallel to and below the inductive-coil plane, The second magnetic layer is substantially planar and lies in a second magnetic layer plane parallel to and below the inductive coil plane; The third magnetic layer is nonplanar. with the third pole and a back gap layer portion remote from the third pole both lying in a buried-portion plane substantially coincident with the inductive-coil, and A coil-registry portion lying in a coil-registry portion plane parallel to and above the inductive-coil plane. and wherein the coil-registry location is within the coil registry portion of the third magnetic layer.