Patent ID: 7394621
Filing Date: 2008-07-01
Classification: G11B,Y10T

Abstract:
1. A method for independently forming neck height and pole width dimensions in a main pole layer of a PMR write head, comprising: (a) forming a main pole layer comprised of a high saturation magnetic moment (Ms) material on a substrate wherein the main pole layer has a first thickness and is comprised of a pole tip region that has a first width, two ends, and two sides in which a first end is a pole tip formed along a first plane that is perpendicular to said substrate and a second end is formed a certain distance from the pole tip and is adjacent to a front side of a front end region of the main pole layer; (b) trimming the first width to form a pole width dimension; (c) forming a top yoke comprised of a high Ms material with a second thickness and a tapered edge on said main pole layer that partially overlaps said pole tip region in which a front portion including said pole tip which is not covered by said top yoke has a first length that is the neck height dimension and a back portion adjacent to said front end region is covered by the top yoke and has a second length wherein the combined first and second lengths are equal to said certain distance.