Patent ID: 8422167
Filing Date: 2013-04-16
Classification: G11B

Abstract:
1. A magnetic writer including: a magnetic shield; a pole piece with a textured surface, wherein the textured surface is perpendicular to a magnetic recording medium and is located only at a tip of the pole piece, and wherein the textured surface is a trailing surface of the tip with respect to a direction of motion of the magnetic recording medium, and wherein the textured surface is adjacent a gap between the pole piece and the magnetic shield, which is opposite the trailing surface of the tip; and an electrical conductor through which currents are passed to effect changes in a magnetic field produced at the tip, wherein the textured surface comprises a series of grooves parallel to the magnetic recording medium and perpendicular to the direction of motion of the medium, and wherein the grooves have widths in the range of 10 nm to 50 nm.