Optical information recording medium and recording method by use

Details Optical information recording medium and recording method by use Optical information recording medium and recording method by use

1997-01-14

1999-06-29

Angebranndt, Martin

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430945, 430346, 4302731, 3692754, 3692752, 428 645, G11B 700

Patent

active

059167300

ABSTRACT:
An optical information recording medium capable of recording information, reproducing recorded information, erasing recorded information, and rewriting recorded information, is composed of a substrate, a recording layer formed on the substrate, the recording layer including as the main component a four-component phase-change recording material comprising Ag, In, Te and Sb, and containing a crystalline phase composed of the microcrystallites of AgSbTe.sub.2 at the erasure of recorded information, an upper heat resistant protective layer formed on the recording layer, the upper heat resistant protective layer including a heat resistant material with a thermal conductivity of 1.0 W/cm.deg or more, and an optical reflecting layer formed on the upper heat resistant protective layer. Optical information can be recorded in this recording medium by applying a laser beam to the recording layer through the substrate at a linear velocity of disc rotation of 1.2 to 5.6 m/sec.

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