Patent ID: 8320073
Filing Date: 2012-11-27
Classification: G11B

Abstract:
1. A perpendicular magnetic recording head, comprising a main pole, wherein a thickness in a down-track direction of the main pole increases moving away from an air bearing surface of the magnetic pole, and wherein a center position in a thickness direction of a portion of the main pole which is exposed at the air bearing surface (the ABS portion) is positioned toward a trailing side of the main pole with respect to a center position in a thickness direction of a portion of the magnetic pole having a greatest cross-sectional area and which is set back from the air bearing surface (the set-back portion), wherein the main pole has a flared shape in which a length in a track-width direction increases moving away from the air bearing surface, wherein a flare angle θ is defined as tanθ=ΔTww/2h, where h is a distance in a direction perpendicular to the air bearing surface at any first cross-track position and ΔTww is a difference between a width in the track-width direction at the first position and a width of the ABS portion, and wherein a flare angle θ