High frequency writer with sliced core topology
AssigneeSeagate Technology LLC
InventorsYuming Zhou, Feng Wang, Jim Giusti, Juan Fernandez-de-Castro
Life of this patent
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Abstract
A magnetic recording head has an air bearing surface and a magnetic core having a height and a width. The magnetic core is formed in part of a plurality of narrow slices having a plurality of insulating channels interspersed therein along the width of the magnetic core. Each of the plurality of narrow slices extends essentially along the height of the magnetic core.
Claims20
A magnetic recording head having an air bearing surface and comprising a conductive coil having a plurality of windings and a magnetic core having a height and a width, the magnetic core comprised in part of a plurality of narrow slices having a plurality of insulating channels interspersed therein along the width of the magnetic core, wherein each of the plurality of narrow slices extends essentially along the height of the magnetic core, and wherein each winding of the conductive coil wraps around the width of the magnetic core.
A magnetic recording head having an air bearing surface and comprising:
- a top magnetic pole having a pole tip region adjacent the air bearing surface, a paddle region opposite the air bearing surface and a neck region between the pole tip region and the paddle region, wherein the paddle region of the top magnetic pole is formed of a plurality of narrow slices having a plurality of insulating channels interspersed therein along a width of the magnetic recording head;
- a bottom magnetic pole having a pole tip region adjacent the air bearing surface and a paddle region opposite the air bearing surface, the pole tip region of the bottom magnetic pole being separated by a write gap from the pole tip region of the top magnetic pole, and a back portion of the paddle region of the bottom magnetic pole being in contact with a back portion of the paddle region of the top magnetic pole;
- wherein the paddle region of the bottom magnetic pole is formed of a plurality of narrow slices having a plurality of insulating channels interspersed therein along the width of the magnetic recording head;
- and
- a conductive coil formed of a plurality of windings, the conductive coil being positioned in part between the top magnetic pole and the bottom magnetic pole, wherein each winding of the conductive coil wraps around at least one of the top magnetic pole and the bottom magnetic pole.
A magnetic recording head having an air bearing surface and comprising a conductive coil and a magnetic core having a height and a width, the magnetic core comprised in part of a plurality of narrow slices having a plurality of insulating channels interspersed therein along the width of the magnetic core, wherein each of the plurality of narrow slices extends essentially along the height of the magnetic core, wherein a width of each insulating channel equals about two times a skin depth of the magnetic core at a desired operating frequency and wherein the conductive coil wraps around the width of the magnetic core.
A magnetic recording head having an air bearing surface and comprising:
- a top magnetic pole having a pole tip region adjacent the air bearing surface, a paddle region opposite the air bearing surface and a neck region between the pole tip region and the paddle region, wherein the paddle region of the top magnetic pole is formed of a plurality of narrow slices and having a plurality of insulating channels interspersed therein along a width of the magnetic recording head;
- wherein a width of each insulating channel of the top magnetic pole equals about two times a skin depth of the top magnetic pole at a desired operating frequency;
- a bottom magnetic pole having a pole tip region adjacent the air bearing surface and a paddle region opposite the air bearing surface, the pole tip region of the bottom magnetic pole being separated by a write gap from the pole tip region of the top magnetic pole, and a back portion of the paddle region of the top magnetic pole;
- wherein the paddle region of the bottom magnetic pole is formed of a plurality of narrow slices having a plurality of insulating channels interspersed therein along the width of the magnetic recording head wherein a width of each insulating channel of the bottom magnetic pole equals about two times a skin depth of the bottom magnetic pole at a desired operating frequency;
- and
- a conductive coil positioned in part between the top magnetic pole and the bottom magnetic pole, wherein the conductive coil wraps around at least one of the top magnetic pole and the bottom magnetic pole.
A magnetic recording head having an air bearing surface and comprising:
- a magnetic core having a height and a width, the magnetic core formed in part of a plurality of narrow slices having a plurality of insulating channels interspersed therein along the width of the magnetic core, wherein each of the plurality of narrow slices extends essentially along the height of the magnetic core;
- and
- a conductive coil formed of a plurality of windings positioned such that each winding of the conductive coil wraps around the plurality of narrow slices.
Dependencies are inferred from the claim text.