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US 2009/0185307 A1Published application
Fly height detection during write operation
AssigneeSamsung Electronics Co., Ltd.
InventorMaxim Roth
Life of this patent
Estimating the term…
Abstract
A hard disk drive that includes a head that is coupled to a disk. The head has a flying height and an inductance. The disk drive also includes a circuit that detects a change in the flying height by sensing a change of head inductance. The circuit can inhibit a write operation if the change in inductance exceeds a threshold.
Claims11
A hard disk drive, comprising:
- a disk;
- a spindle motor that rotates said disk;
- a head that is coupled to said disk and has a flying height and an inductance;
- and,
- a circuit that detects a change in the flying height by sensing a change of said head inductance.
2 more elements
A hard disk drive, comprising:
- a disk;
- a spindle motor that rotates said disk;
- a head that is coupled to said disk and has a flying height and an inductance;
- and,
- circuit means for detecting a change in the flying height by sensing a change of head inductance.
2 more elements
A method for detecting a change in a flying height of a head in a hard disk drive, comprising:
- sensing a change in an inductance of a head to detect a change in a flying height of the head.
Dependencies are inferred from the claim text.