Optical recording medium and optical recording method using the

Details Optical recording medium and optical recording method using the Optical recording medium and optical recording method using the

1991-09-09

1994-08-23

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

3692752, 430270, G11B 700

Patent

active

053413580

ABSTRACT:
An optical recording medium having a layer of recording material provided on a substrate, the material having an optical property which is changed reversibly by means of light or heat, so that writing/reproducing or writing/reproducing/erasing of information is performed by using the reversible change of the optical property of the recording material layer. The recording material is composed of a plurality of elements and is capable of taking, as a melt state thereof, a selected one of a single phase state and a two-phase coexistent state. An optical recording method for performing writing/reproducing/erasing of information uses a reversible change of an optical property of the recording material layer by irradiating the recording material layer with a high-power light beam so as to melt it into a single phase state and then cooling the recording material layer so as to form a phase-changed portion corresponding to a recording state or an erasing state. The recording material layer is irradiated with a low-power light beam so as to be melted into a two-phase coexistence state and then cooled so as to form a phase-changed portion corresponding to an erasing state or a recording state.

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