Hard disk drive apparatus, method to control flying height...

Details Hard disk drive apparatus, method to control flying height... Hard disk drive apparatus, method to control flying height...

2011-06-07

2011-06-07

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

Reexamination Certificate

active

07957086

ABSTRACT:
A method of controlling a flying height of a magnetic head of a hard disk drive apparatus includes producing a reference FOD (flying on demand) voltage profile defining a relationship between the flying height of the magnetic head and an FOD voltage at a measured temperature, wherein an end of the magnetic head thermally expands and protrudes when the FOD voltage is applied to a heater included in the magnetic head and setting the reference FOD voltage profile that is corrected using a reference maximum flying height of the magnetic head that is preset at room temperature, as an applied FOD voltage profile to control the flying height of the magnetic head.

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European Office Action issued Feb. 20, 2009 in EP Application No. 08151267.5.

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