US 8,947,828 B1Granted

Magnetic head having a double bump wrap around shield

AssigneeHGST Netherlands B.V.

InventorsWen-Chien D. Hsiao, Na Young Kim, Terence T. L. Lam, Yansheng Luo, Aron Pentek, Honglin Zhu

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Abstract

In one embodiment, an apparatus includes a main pole, at least one side shield positioned on sides of the main pole, and a trailing shield having a multi-bump structure positioned near a trailing side of the main pole, wherein the multi-bump structure has six junctures along the trailing shield facing the main pole, a first juncture positioned at a media-facing surface, a sixth juncture positioned away from the media-facing surface, and second, third, fourth, and fifth junctures positioned along the side of the trailing shield facing the main pole between the first and sixth juncture, wherein an element height of a first face of the trailing shield positioned between the fourth and fifth juncture is less than an element height of a second face of the trailing shield positioned at an end of the trailing shield positioned opposite the media-facing surface of the trailing shield.

Claims20

Dependent claims

An apparatus, comprising:

a main pole;
at least one side shield positioned near one or more sides of the main pole in a cross-track direction;
and
a trailing shield positioned near a trailing side of the main pole,
wherein the trailing shield comprises a multi-bump structure having at least six trailing junctures on a side of the trailing shield facing the main pole, each trailing juncture defining a region where two surfaces of the trailing shield are joined,
wherein a first trailing juncture is positioned at a media-facing surface of the trailing shield, a sixth trailing juncture is positioned away from the media-facing surface of the trailing shield, and second, third, fourth, and fifth trailing junctures are positioned along the side of the trailing shield facing the main pole between the first trailing juncture and the sixth trailing juncture,
wherein a first face of the trailing shield is positioned between the fourth trailing juncture and the fifth trailing juncture,
wherein a second face of the trailing shield is positioned at an end of the trailing shield positioned opposite the media-facing surface of the trailing shield, and
wherein an element height of the first face of the trailing shield is less than an element height of the second face.

6 more elements

Dependencies are inferred from the claim text.