Patent ID: 8385020
Filing Date: 2013-02-26
Classification: G11B

Abstract:
1. A method to eliminate wide area track erasure (WATE) in a perpendicular magnetic write head having a recording medium, an air bearing surface (ABS), a main pole, a write shield, a side shield, a lead shield, side gap edges, and a top yoke, comprising: partitioning each of said shields into opposing pairs of contiguous first and second sections only, said first section being closer to said main pole than said second section; partitioning said yoke into a single central section flanked by an opposing pair of outer sections; for each of said shields, moving only said second sections a first distance away from both the ABS and the recording medium; and thereby reducing to insignificance any disturb fields originating at said second section while continuing to prevent fringe fields generated during write operations from reaching the recording medium.