Adjustable permanent magnet bias
AssigneeSeagate Technology LLC
InventorsMichael Allen Seigler, Gregory John Parker, Petrus Antonius Van der Heijden
Life of this patent
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Abstract
A read head, particularly suitable for a magnetic disc storage system, includes a read sensor having an air-bearing surface and an opposing top surface. The read head also includes a permanent magnet positioned adjacent the top surface of the read sensor for generating a magnetic bias field in the read sensor. The permanent magnet has a magnetization in a direction other than normal to the air-bearing surface of the read sensor.
Claims19
A current perpendicular to the plane read head, comprising:
- a read sensor having an air-bearing surface and an opposing top surface;
- and;
- a permanent magnet positioned adjacent said top surface of said read sensor for generating a magnetic bias field in said read sensor, said permanent magnet having a magnetization in a direction other than normal to said air-bearing surface of said read sensor.
A current perpendicular to the plane read head, comprising:
- a read sensor;
- and
- means for generating and adjusting a magnetic bias field in said read sensor.
A read head for a magnetic disc storage system, comprising:
- a read sensor having an air-bearing surface and an opposing top surface;
- and
- a permanent magnet positioned adjacent the top surface of the read sensor for magnetically biasing the read sensor, said permanent magnet having a magnetization set in a direction other than normal to the air-bearing surface of the read sensor.
A magnetic disc drive storage system, comprising:
- a housing;
- a rotatable magnetic storage medium positioned in said housing;
- and
- a movable recording head mounted in said housing adjacent said magnetic storage medium,
- said recording head including a current perpendicular to the plane read head comprising:
- a read sensor having an air-bearing surface and an opposing top surface;
- and
- a permanent magnet positioned adjacent said top surface of said read sensor for generating a magnetic bias field in said read sensor, said permanent magnet having a magnetization in a direction other than normal to said air-bearing surface of said read sensor.
A method of using a permanent magnet to generate a magnetic bias field in a read sensor having an air-bearing surface and an opposing top surface, comprising:
- establishing a magnetization in the permanent magnet;
- and
- positioning said permanent magnet adjacent to the top surface of the read sensor such that the magnetization of the permanent magnet is in a direction other than normal to the air-bearing surface of the read sensor.
Dependencies are inferred from the claim text.