Magnetic spacing control method for magnetic head,...

Details Magnetic spacing control method for magnetic head,... Magnetic spacing control method for magnetic head,...

2006-07-13

2009-02-03

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040

Reexamination Certificate

active

07486465

ABSTRACT:
In a magnetic disk device, a magnetic head protrudes when a write current is applied to a write element, and the protrusion amount is controlled using a heat generating element provided on the magnetic head. During read operations, power equal to the sum of a first power value and a second power value is supplied to the heat generating element of the magnetic head, and during write operations, power equal to the first power value is supplied to the heat generating element in addition to the write power. In this manner, protrusion can be controlled to compensate for scattering among the heads and changes in ambient conditions, so that overwrite characteristics can be improved, and read characteristics can also be improved.

REFERENCES:
patent: 6504662 (2003-01-01), Sobey
patent: 6798598 (2004-09-01), Suzuki et al.
patent: 7324299 (2008-01-01), Schreck et al.
patent: 2005/0057841 (2005-03-01), Stover et al.
patent: 05-020635 (1993-01-01), None
patent: 2004-281012 (2004-10-01), None
patent: 2004-342151 (2004-12-01), None

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