Patent ID: 8238059

Claim:
A perpendicular magnetic recording (PMR) writer, comprising: (a) a main pole comprised of a trailing side and a leading side with respect to a down-track direction, and two sides connecting said leading and trailing sides; said leading side has a leading edge at an air bearing surface (ABS) and said trailing side has a trailing edge at the ABS; (b) a gap layer adjacent to and surrounding the main pole at the ABS wherein said gap layer includes a write gap along the trailing side and trailing edge, a lead gap along the leading side and leading edge, and a side gap along each of the sides of the main pole; (c) a first shield section formed adjacent to at least one of the write gap, side gaps, and lead gap, said first shield section is comprised of an anisotropic (-Ku) magnetic material with a hard axis in a direction toward the main pole and a magnetization that is induced in a direction orthogonal to the hard axis with a weak magnetic field; and (d) an isotropic magnetic shield formed adjacent to each first shield section on a side thereof facing away from the main pole, and contacting portions of the gap layer that are not adjacent to a first shield section.