Patent ID: 9218830
Filing Date: 2015-12-22
Classification: G11B,Y10T

Abstract:
1. A method for locally annealing a main pole structure in a write head, comprising: (a) providing a main pole structure on a substrate wherein the main pole structure comprises a narrow pole tip portion with a front end that adjoins a plane formed proximate to an eventual air bearing surface (ABS) plane, and a yoke portion that adjoins the pole tip portion along a back end at a plane that is a neck height distance from the eventual ABS plane; (b) attaching a first lead to a back side of the yoke portion to form a first terminal, and electrically connecting a second lead to the front end of the narrow pole tip portion to form a second terminal; and (c) injecting a first current through the first lead that passes through the main pole structure including the narrow pole tip portion and exits through the second lead thereby causing resistive heating to locally anneal the narrow pole tip portion without substantially elevating a temperature in adjacent layers of the write head.