Patent ID: 7248434
Filing Date: 2007-07-24
Classification: G11B,Y10T

Abstract:
1. A magnetic head, comprising: an etch stop layer; a transfer layer positioned above the etch stop layer with a trench formed therein, walls of the trench tapering together towards the etch stop layer; and a pole tip layer situated in the trench to define a pole tip structure flanked at least in part by the transfer layer; wherein at least one of an upper surface and a lower surface of at least one of the etch stop layer and the transfer layer remains in co-planar relationship with at least one of an upper surface and a lower surface of the pole tip structure, wherein a continuously planar portion of the etch stop layer is coextensive with and extends beyond the at least one of the upper surface and a lower surface of the pole tip structure in a direction parallel to a plane of deposition of the etch stop layer and parallel to an air bearing surface of the head.