Rewritable storage apparatus using first and second bias magneti

Details Rewritable storage apparatus using first and second bias magneti Rewritable storage apparatus using first and second bias magneti

1994-11-18

1996-12-31

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1100

Patent

active

055900968

ABSTRACT:
The speed of a write operation in an optical magnetic disk unit is improved by effectively setting the bias magnetic field. When new data is written in an area on a medium, a bias control method for a rewritable storage apparatus which records data by applying a bias magnetic field for data recording and erases recorded data by applying a bias magnetic field for data erasing, applies the bias magnetic field for data erasing to the area to perform an erase operation; applies the bias magnetic field for writing to the area to perform a record operation to record the new data; and applies and maintains the bias magnetic field for data erasing to the medium directly after the record operation is finished.

REFERENCES:
patent: 5291345 (1994-03-01), Umeda et al.
patent: 5317548 (1994-05-01), Matsuda et al.
patent: 5327417 (1994-07-01), Tanaka et al.
patent: 5345431 (1994-09-01), Oliver et al.
patent: 5351221 (1994-09-01), Ohno
patent: 5367508 (1994-11-01), Haba

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