Disk drive with head fly-height compensation for disk...

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Reexamination Certificate

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07457072

ABSTRACT:
A disk drive has a head fly-height actuator wherein the head-disk spacing is controlled as a function of both the track, and the sector or sectors within the track, where data is to be read or written. The fly-height actuator may be a thermal actuator comprising a heater located on the slider near the read/write head. The fly-height controller (FHC) for the thermal actuator stores band control signal (BCS) values representative of heater power (Hp) to be applied to the thermal actuator when reading or writing to a data track in the associated band of tracks. The FHC also either calculates from a programmed equation or recalls sector control signal (SCS) values representative of an Hp increment to be applied to the thermal actuator depending on the sector or sectors where data is to be written. The FHC sums the appropriate SCS value with the appropriate BCS value to achieve the desired Hp, resulting in the optimal fly-height not only for the selected band but also for the selected sector or sectors.

REFERENCES:
patent: 5021906 (1991-06-01), Chang et al.
patent: 5130866 (1992-07-01), Klaassen et al.
patent: 5276573 (1994-01-01), Harada et al.
patent: 5991113 (1999-11-01), Meyer et al.
patent: 6344949 (2002-02-01), Albrecht et al.
patent: 6501606 (2002-12-01), Boutaghou et al.
patent: 6570730 (2003-05-01), Lewis et al.
patent: 6611399 (2003-08-01), Mei et al.
patent: 6775103 (2004-08-01), Kang et al.
patent: 6947242 (2005-09-01), Seing et al.
patent: 7023647 (2006-04-01), Bloodworth et al.
patent: 7068449 (2006-06-01), Riddering et al.
patent: 7224547 (2007-05-01), Suk
patent: 7271975 (2007-09-01), Shimizu et al.
patent: 2005/0024775 (2005-02-01), Kurita et al.
patent: 2005/0264912 (2005-12-01), Nikitin et al.
patent: 2006/0023331 (2006-02-01), Flechsig et al.
patent: 2006/0092570 (2006-05-01), Payne et al.
patent: 2006/0158768 (2006-07-01), Tanabe
patent: 2007/0146920 (2007-06-01), Kitamura et al.
“Head-Disk Spacing Controller for Magnetic Recording.” Apr. 1, 1989, IBM TDB vol. 31, No. 11, pp. 240-241.

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