Rotary actuator disk drive with identical dual-element read/writ

Details Rotary actuator disk drive with identical dual-element read/writ Rotary actuator disk drive with identical dual-element read/writ

1993-12-02

1995-08-22

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360126, 360106, G11B 539, G11B 5147, G11B 555

Patent

active

054445892

ABSTRACT:
A rotary actuator disk drive uses substantially identical dual-element inductive write/magnetoresistive read transducers for both the top and bottom disk surfaces. There is no requirement that the read elements be mechanically offset from the write elements, as is typically the case in rotary actuator disk drives due to the head-to-track skew caused by the inherent nonlinear path of the heads across the data tracks. The transducers are supported on the trailing ends of the head carriers in such a manner that the geometric centers of the read and write elements are aligned without any mechanical offset. Sense currents of opposite polarity are provided to the magnetoresisitve read elements adjacent the top and bottom disk surfaces to shift the magnetic centers of the top and bottom read elements in opposite directions relative to their geometric centers. The amount and direction of the magnetic shift is such that the read elements are effectively offset from their respective write elements so that the skew caused by the rotary actuator has minimal effect on alignment of the read and write elements with the data tracks.

REFERENCES:
patent: 4878140 (1989-10-01), Gill et al.
patent: 5218497 (1993-06-01), Tanabe et al.
patent: 5227212 (1993-07-01), Ahlert et al.
patent: 5257148 (1993-10-01), Solhjell et al.
patent: 5257149 (1993-10-01), Meyer
patent: 5309305 (1994-05-01), Nepela et al.

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