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US 7,212,379 B2Granted
Perpendicular magnetic recording head with flare and taper configurations
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsYimin Hsu, Quang Le, Jui-Lung Li, Ian Robson McFadyen, James Lamar Nix, Neil Leslie Robertson, Mason Lamar Williams, III
Life of this patent
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Abstract
A magnetic write head for use in perpendicular magnetic data recording. The write head includes a write pole and a trailing shield having a tapered surface. A return pole stitched to the trailing shield is magnetically connected with the write pole at a location away from the air bearing surface (ABS).
Claims8
A write element for perpendicular magnetic recording, comprising:
- a write pole terminating at a plane defining an air bearing surface and having a track width measured parallel to the air bearing surface;
- a return pole magnetically connected with said write pole in a back gap area and having a width greater than said track width;
- said write pole being one or more layers of magnetic material having a tapered surface portion wherein said write pole becomes progressively thicker with increased distance from said air hearing surface;
- a magnetic shield, magnetically connected with said return pole, and having a tapered surface portion substantially parallel with said tapered surface portion of said write pole and separated from said write pole by a non-magnetic write gap layer.
1 more element
A magnetic write element for perpendicular magnetic recording, comprising:
- magnetic write pole having a track width and terminating at an air bearing surface (ABS);
- a magnetic return pole having a width substantially larger than said write pole, said return pole being in magnetic connection with said write pole in a back gap area;
- a trailing shield, said shield having a tapered surface that is disposed adjacent to said write pole and separated therefrom by a non-magnetic write gap;
- wherein said tapered shield further includes first and second laterally flared wing portions and wherein said laterally flared wing portions initiate at a point closer to the ABS than said tapered surface.
1 more element
Dependencies are inferred from the claim text.