Patent ID: 9406317
Filing Date: 2016-08-02
CPC Classification: G11B

Claim Text:
1. A perpendicular magnetic recording (PMR) writer, comprising: (a) a main pole with a leading edge at an air bearing surface (ABS) and formed at a first plane, and a trailing edge at the ABS and formed at a second plane where the first and second planes are parallel to each other and are orthogonal to the ABS and to a center plane formed equidistant between two main pole sides that connect the leading edge and trailing edge; (b) a gap layer surrounding the main pole at the ABS and comprising a write gap that contacts the trailing edge and has a first cross-track width, and a side gap layer adjoining the main pole sides and leading edge; (c) a side shield comprising a 10-16 kG magnetic layer on each side of the center plane, each side shield comprises; (d) a composite trailing shield, comprising: