Erasable optical recording medium with a reversible light absorp

Details Erasable optical recording medium with a reversible light absorp Erasable optical recording medium with a reversible light absorp

1994-02-16

1995-08-15

Epps, Georgia Y.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369100, 369284, 369288, 428913, 430945, G11B 726

Patent

active

054426197

ABSTRACT:
An optical information carrier comprising a substrate, an auxiliary layer bounded by dielectric layers, a thin reflection layer, a dielectric layer, a phase-change layer, a dielectric layer, a tight metal reflection layer and a protective layer. The information carrier is recordable and erasable by a laser-light beam and can be played in a conventional CD player. The auxiliary layer consists of selenium or AlGaAs, and has the property that the absorption increases substantially at temperatures above 70.degree. C. An information carrier comprising this auxiliary layer can be recorded with a lower laser power as compared to information carrier which does not comprise the auxiliary layer.

REFERENCES:
patent: 4651172 (1987-03-01), Watanabe et al.
patent: 5242784 (1993-09-01), Chen et al.
patent: 5270149 (1993-12-01), Iselborn et al.
patent: 5346740 (1994-09-01), Ohno et al.

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