Patent ID: 7881019
Filing Date: 2011-02-01
Classification: G11B

Abstract:
1. A magnetic shield structure for use in a magnetic recording head having an air bearing surface (ABS), the magnetic shield structure comprising: a centrally disposed, forward protruding portion extending toward the ABS and terminating at first and second laterally opposed sides that are perpendicular to the ABS; and first and second laterally extending wing portions, extending laterally outward from the first and second sides of the centrally disposed, forward protruding portion; the first and second wing portions each having an inner portion and an outer portion, the inner portion of each wing portion being disposed between the outer portion of the wing portion and the centrally disposed, forward protruding portion of the structure; the inner portion of each wing portion having a front edge disposed toward the ABS that is parallel with and recessed from the ABS by a substantially constant recess distance; the outer portion of each wing portion having a tapered front edge disposed toward the ABS that is recessed from the ABS by a recess distance that increases at a constant rate with increasing distance from the center of the structure; wherein the outer portion of each wing portion meets the inner portion of the wing portion at a smooth, non-stepped junction, and wherein the outer portion of each wing portion extends from the junction to an outermost end of the wing portion, the outermost end of the wing portion being perpendicular to the ABS, and wherein the magnetic structure including the centrally disposed forward protruding portion and inner and outer wing portions are disposed in a common plane; wherein the distance between the first and second sides of the central, forward protruding portion defines a first width W wherein the distance between the junction of the inner and the outer portions to the forward protruding portion defines an inner wing portion length (L