Method of recording using selective-erasure directions for magne

Details Method of recording using selective-erasure directions for magne Method of recording using selective-erasure directions for magne

1988-08-10

1990-06-26

Stephan, Steven L.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 54, 369 58, G11B 1112

Patent

active

049378007

ABSTRACT:
In method of operating a magnetic recorder, magnetooptic, for example, the erasure direction for successive recording areas (sectors) are determined by the direction of magnetization of prior recording. When the erasure direction is reversed, the direction of remanent magnetiaztion indicating a "non-erasure", record or information representing direction is also reversed. A mark is placed in each sector for identifying its erasure direction.

REFERENCES:
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patent: 4412264 (1983-10-01), Imamura
patent: 4539662 (1985-09-01), Hatano
patent: 4688203 (1987-08-01), Koishi et al.
patent: 4688204 (1987-08-01), Noyes, Jr. et al.
patent: 4712203 (1987-12-01), Saito et al.
patent: 4730289 (1988-03-01), Saitoh et al.
patent: 4789972 (1988-12-01), Oldham

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