Magneto-optical recording medium having a reading layer in which

Details Magneto-optical recording medium having a reading layer in which Magneto-optical recording medium having a reading layer in which

1998-09-25

2000-09-12

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

428694ML, 428694MM, G11B 1100

Patent

active

061187364

ABSTRACT:
A magneto-optical recording medium and a reading method thereof are disclosed, in which the reading output is hardly reduced even in bits written at sufficiently narrower intervals than the optical diffraction limit of light for reading. The magneto-optical recording medium is that in an area the temperature of which has become not lower than a first predetermined temperature by radiation of a reading laser beam, a reading layer becomes a perpendicularly magnetized film, while recording marks in a recording layer are transferred to the reading layer, and these recording marks transferred to the reading layer are extended in the reading layer in an area the temperature of which has reached a second predetermined temperature or more.

REFERENCES:
patent: 5623458 (1997-04-01), Matsumoto et al.
patent: 5627803 (1997-05-01), Negishi
patent: 5633838 (1997-05-01), Hirokane et al.
patent: 5684764 (1997-11-01), Hirokane et al.
patent: 5723227 (1998-03-01), Matsumoto et al.
patent: 5754500 (1998-05-01), Tanaka et al.
patent: 5838645 (1998-11-01), Hirokane et al.
patent: 5879822 (1999-03-01), Okada
patent: 5896350 (1999-04-01), Tamanoi et al.

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