Phase change optical recording medium, method of overwriting sam

Details Phase change optical recording medium, method of overwriting sam Phase change optical recording medium, method of overwriting sam

1998-09-30

2000-08-29

Neyzari, Ali

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369288, 428 641, G11B 724, B32B 300

Patent

active

061118494

ABSTRACT:
An optical recording medium comprising a substrate, at least one dielectric layer and a phase change type recording layer. In overwriting, the recording medium should satisfy the condition V.sub.OW /V.sub.OP <1, preferably 0.5.ltoreq.V.sub.OW /V.sub.OP <0.95, where V.sub.OP is the optimum linear velocity and V.sub.OW is a linear velocity for overwriting. This enables the erasability of recorded marks on the medium to be at least 26 dB after the recording medium with the recorded marks has been stored for at least 100 hours at 60 to 80.degree. C.

REFERENCES:
patent: 5063097 (1991-11-01), Hirota et al.
patent: 5362538 (1994-11-01), Ohbayashi et al.
patent: 5527661 (1996-06-01), Akahira et al.
patent: 5637372 (1997-06-01), Tominaga et al.

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