Magneto-optical disk, optical pickup, and magneto-optical disk d

Details Magneto-optical disk, optical pickup, and magneto-optical disk d Magneto-optical disk, optical pickup, and magneto-optical disk d

1997-11-13

1999-05-25

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

3692752, G11B 1100

Patent

active

059075252

ABSTRACT:
A magneto-optical disk including a transparent substrate, pit strings containing information formed in spiral or concentric form on a surface of the transparent substrate, a magneto-optical recording medium layer for covering the surface of the transparent substrate having the pit strings formed thereon, and magneto-optical recording areas formed by spiral or concentric flat portions between adjacent pit strings. An optical pickup for reproducing pit information and magneto-optically-recorded information from the magneto-optical disk. A magneto-optical disk drive for recording and reproducing information on the magneto-optical disk. The magneto-optical disk has a memory capacity which is twice the memory capacity of a conventional magneto-optical disk having ROM, and is accessed at high speeds.

REFERENCES:
patent: 5138598 (1992-08-01), Sako et al.
patent: 5383176 (1995-01-01), Inui et al.
patent: 5432774 (1995-07-01), Fukumoto et al.
patent: 5497367 (1996-03-01), Yamagami et al.
patent: 5715232 (1998-02-01), Chikazawa et al.
patent: 5717675 (1998-02-01), Yamamoto

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