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US 6,888,700 B2Granted
Perpendicular magnetic recording apparatus for improved playback resolution having flux generating elements proximate the read element
AssigneeSeagate Technology LLC
InventorsDmitri Litvinov, Sakhrat Khizroev
Life of this patent
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Abstract
A perpendicular magnetic recording head for improving resolution includes a read element and a magnetic flux generating element spaced apart from the read element. The magnetic flux generating element transmits a magnetic flux into a soft magnetic underlayer of a magnetic recording medium adjacent an air-bearing surface of the magnetic flux generating element. The magnetic flux transmitted to the soft magnetic underlayer flows in the soft magnetic underlayer away from an area of the soft magnetic underlayer beneath the read element.
Claims17
An apparatus comprising:
- a magnetic recording medium having a hard magnetic recording layer and a soft magnetic underlayer;
- and
- a perpendicular magnetic recording head comprising:
- a read element having a first side and a second side;
- a first magnetic flux generating element spaced apart from the first side of said read element, wherein said first magnetic flux generating element transmits a magnetic flux into the soft magnetic underlayer adjacent an air-bearing surface of the first magnetic flux generating element;
- and
- a second magnetic flux generating element spaced apart from the second side of said read element, wherein said second magnetic flux generating element transmits a magnetic flux into the soft magnetic underlayer adjacent an air-bearing surface of the second magnetic flux generating element, wherein the magnetic flux transmitted to the soft magnetic underlayer by the first magnetic flux generating element flows in an opposite direction within the soft magnetic underlayer than the flow of the magnetic flux transmitted to the soft magnetic underlayer by the second magnetic flux generating element.
4 more elements
A magnetic disc drive storage system, comprising:
- a housing;
- a magnetic recording medium having a hard magnetic recording layer and a soft magnetic underlayer;
- and
- a perpendicular magnetic recording head positioned adjacent the magnetic recording medium, the recording head comprising:
- a read element having a first side and a second side;
- a first magnetic flux generating element spaced apart from the first side of said read element, wherein said first magnetic flux generating element transmits a magnetic flux into the soft magnetic underlayer adjacent an air-bearing surface of the first magnetic flux generating element;
- and
- a second magnetic flux generating element spaced apart from the second side of said read element, wherein said second magnetic flux generating element transmits a magnetic flux into the soft magnetic underlayer adjacent an air-bearing surface of the second magnetic flux generating element, wherein the first and second magnetic flux generating elements improve the resolution of the recording head, wherein the magnetic flux transmitted to the soft magnetic underlayer by the first magnetic flux generating element flows in an opposite direction within the soft magnetic underlayer than the flow of the magnetic flux transmitted to the soft magnetic underlayer by the second magnetic flux generating element.
5 more elements
An apparatus comprising:
- a magnetic recording medium having a hard magnetic recording layer and a soft magnetic underlayer;
- and
- a perpendicular magnetic recording head comprising:
- a read element having a first side and a second side;
- a first magnetic flux generating element spaced apart from the first side of said read element, wherein said first magnetic flux generating element transmits a magnetic flux into the soft magnetic underlayer adjacent an air-bearing surface of the first magnetic flux generating element;
- and
- a second magnetic flux generating element spaced apart from the second side of said read element, wherein said second magnetic flux generating element transmits a magnetic flux into the soft magnetic underlayer adjacent an air-bearing surface of the second magnetic flux generating element, wherein the first magnetic flux generating element includes an inner magnetic element and an outer magnetic element, said inner magnetic element spaced apart from the first side of said read element and positioned between said read element and said outer magnetic element.
4 more elements
Dependencies are inferred from the claim text.