Patent ID: 9105287
Filing Date: 2015-08-11
Classification: G11B,Y10T

Abstract:
1. A method of forming a multi-level tapered write pole for a PMR head, comprising: providing a substrate having a planar surface; forming in said substrate a trench, wherein a front portion of said trench is bounded by a front edge and a face extending therefrom into said substrate perpendicular to said substrate planar surface and said trench includes a downward sloped region extending rearward from said face and a flat region parallel to said substrate planar surface extending rearward thereafter; forming a bottom yoke in said trench, whereby said downward sloped region defines a second taper on said bottom yoke and wherein a front edge of said bottom yoke is defined by said front edge of said trench; planarizing said bottom yoke; forming a main pole over said planarized bottom yoke, a front, edge of said main pole extending forward beyond said front edge of said bottom yoke and defining an ABS of said main pole; forming a top yoke layer on said main pole, wherein said top yoke is vertically above and horizontally coextensive with said bottom yoke; forming on said top yoke layer a downward sloped region substantially mirror symmetric with respect to said downward sloped region in said bottom yoke; shaping said main pole to produce thereon a first taper; wherein said first taper ends a distance, d, before said front edge of said bottom yoke begins.