Dynamic magnetic information storage or retrieval – Head mounting – For adjusting head position
Reexamination Certificate
2006-09-19
2006-09-19
Heinz, A. J. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head mounting
For adjusting head position
C360S294400
Reexamination Certificate
active
07110224
ABSTRACT:
There is provided a magnetic disk drive in which a flying-height fluctuation produced by the operation of a fine actuator is decreased, the reliability is high, and recording density is high. For this purpose, the magnetic disk drive is configured as described below. The magnetic disk drive has a suspension including a base plate connected to a carriage, a load beam fitted with a slider, and a fine actuator which is provided on the base plate and finely moves the load beam. The configuration is such that the shortest track travel time using the fine actuator is larger than the inverse number of the local maximum of a flying-height fluctuation frequency of the suspension by the fine actuator. Also, the configuration is such that the shortest track travel time using the fine actuator is larger than the inverse number of the natural frequency of first torsion mode of the suspension by the fine actuator.
REFERENCES:
patent: 6157521 (2000-12-01), Utsunomiya
patent: 6295184 (2001-09-01), Takekado
patent: 6724560 (2004-04-01), Koganezawa et al.
“Microatuator for Magnetic Disk Drive”, Journal of the Institute of Electrical Engineers of Japan, vol. 120, No. 11, Nov. 2000, pp. 690-692.
Nakamura, S. et al, “Flying-Height Characteristic and Lifetime of Φ-Shaped Actuated Suspension”, Japan Society of Mechanical Engineers, No. 01-1 [IV], pp. 227-228.
Nakamura Shigeo
Takahashi Haruhide
Wakatsuki Kousaku
Heinz A. J.
Hitachi Global Storage Technologies Japan Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
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