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EUTECTIC SYSTEMS FOR OPTICAL RECORDING MEDIA

IP.com Disclosure Number: IPCOM000024674D
Original Publication Date: 1981-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 47K

Publishing Venue

Xerox Disclosure Journal

Abstract

Eutectic alloys may be employed for recording media in laser beam optical recording systems because of their low melting characteristics. An attractive scheme for write-once optical storage systems is the use of a pulsed laser beam to locally heat a thin film above its melting point and cause a permanent change in the reflectivity properties of the film. It is desirable that these thin films have the properties of high write sensitivity, high resolution, insensitivity to the laser read beam, long life, low defect density, short write response time and low manufacturing cost.

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XEROX DISCLOSURE JOURNAL

EUTECTIC SYSTEMS FOR OPTICAL RECORDING MEDIA U.S. CI. 346/135
Anonymous Int. C1. Gold

Proposed Classification

Eutectic alloys may be employed for recording media in laser beam optical recording systems because of their low melting characteristics.

An attractive scheme for write-once optical storage systems is the use of a pulsed laser beam to locally heat a thin film above its melting point and cause a permanent change in the reflectivity properties of the film. It is desirable that these thin films have the properties of high write sensitivity, high resolution, insensitivity to the laser read beam, long life, low defect density, short write response time and low manufacturing cost.

These characteristics may be achieved in the preparation of thin films of binary, ternary or multielement compositions or systems employing eutectic alloys that are essentially inert to oxidation and ambient deterioration. Some examples of systems are gold-silicon, gold-germanium, aluminum-silicon, aluminum-germanium, gold-tin and cadmium-zinc.

Volume 6 Number 4 July/August 1981 191

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192

  XEROX DISCLOSURE JOURNAL Volume 6 Number 4 July/August 1981

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