Rewritable disk-shaped optical recording medium

Details Rewritable disk-shaped optical recording medium Rewritable disk-shaped optical recording medium

1996-09-13

1998-03-03

Neyzari, Ali

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692754, G11B 724

Patent

active

057243387

ABSTRACT:
A magneto-optical recording medium includes at least a reading layer and a writing layer on a substrate. A track guide groove is formed in the medium so as to include in-groove portions and on-land portions. Only a portion where a temperature has been raised by optical beam irradiation is read, while a domain of a writing layer is copied on the writing layer, whereby a writing/reading operation can be effected with narrower track pitches. By this arrangement, there can be realized a narrow track pitch which is narrower than the diameter of a laser beam.

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patent: 5402411 (1995-03-01), Maeda et al.
patent: 5422874 (1995-06-01), Birukaba et al.
"Magnetic Recording ", vol. 1, Technology, C. Denis Mee et al., 1987, pp. 174-179.

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