Phase change recording medium for allowing a tracking servo cont

Details Phase change recording medium for allowing a tracking servo cont Phase change recording medium for allowing a tracking servo cont

1998-04-08

2000-01-25

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 13, 3692754, 428 643, G11B 726

Patent

active

060185104

ABSTRACT:
An erasable phase change recording medium includes a transparent substrate, a recording layer of a phase change material provided on the substrate, and a protection layer provided to protect the recording layer on the substrate. Tracks are formed with alternate grooves and lands on the substrate of the recording medium and data is recorded to at least one of the grooves and the lands. The recording medium is configured to have a track pitch between 0.6 .mu.m and 0.8 .mu.m and a groove depth between 0.11.L and 0.18.L where L is a wavelength of a laser beam.

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