Patent ID: 9082433
Filing Date: 2015-07-14
Classification: G11B

Abstract:
1. A perpendicular magnetic recording (PMR) writer, comprising: (a) a main pole layer comprised of a main pole tip with one end having a leading edge and trailing edge at an air bearing surface (ABS), a second end that adjoins a yoke portion at a neck height distance from the ABS, and two sides that are perpendicular to the ABS and formed between the first and second ends; (b) a gap layer adjacent to and surrounding the main pole tip wherein the gap layer includes a write gap along a trailing side and the trailing edge, a lead gap along a leading side and the leading edge, and a side gap along each of the two sides of the main pole tip; and (c) a fully all wrapped around (AWA) shield structure comprising a trailing shield formed on the write gap, a leading shield that adjoins the leading gap, and two side shields with one side shield on each side of the main pole tip and adjoining a side gap, and wherein at least the two side shields have a patterned structure comprising: