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US 2011/0032643 A1Published application
Exchange coupled composite (ecc) pmr media without protective layer through soft-ferrite
OwnerSooyoul Honginventor
Life of this patent
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Abstract
A disk for a hard disk drive. The disk includes a first magnetic layer supported by a substrate and an intermediate layer adjacent to the first magnetic layer. The disk also includes a second magnetic layer that is adjacent to the intermediate layer and includes barium. The barium second magnetic layer has a mechanical hardness so that a protective layer such as COC is not required for the disk.
Claims12
A magnetic disk for a hard disk drive, comprising:
- a substrate;
- a first magnetic layer supported by said substrate;
- an intermediate layer adjacent to said first magnetic layer;
- and,
- a second magnetic layer adjacent to said intermediate layer, said second magnetic layer includes barium.
2 more elements
A hard disk drive, comprising:
- a base plate;
- a spindle motor coupled to said base plate;
- a disk coupled to said spindle motor, said disk including;
- a substrate;
- a first magnetic layer supported by said substrate;
- an intermediate layer adjacent to said first magnetic layer;
- a second magnetic layer adjacent to said intermediate layer, said second magnetic layer includes barium;
- an actuator arm mounted to said base plate;
- a voice coil motor coupled to said actuator arm;
- and,
- a head coupled to said actuator arm and said disk.
8 more elements
A method for fabricating a disk of a hard disk drive, comprising:
- forming a first layer of magnetic material over a substrate;
- forming an intermediate layer over the first layer of magnetic material;
- and,
- forming a second layer of magnetic material that includes barium over the intermediate layer.
1 more element
Dependencies are inferred from the claim text.