Optical recording medium

Details Optical recording medium Optical recording medium

1987-02-24

1989-02-07

Hecker, Stuart N.

Static information storage and retrieval

Radiant energy

Amorphous

365106, 365126, 369284, G11C 1300

Patent

active

048036609

ABSTRACT:
In an optical memory of phase transition type such that information is recorded or erased by reversibly changing the phase of a thin recording film between equilibrium phase and non-equilibrium phase in response to a laser beam, the memory is formed with a recording film comprising as the main component an intermetallic compound with a melting point between 300.degree. to 800.degree. C. in accordance with a binary target co-sputtering technique. Since the phase transition temperature of the recording film is higher than room temperatures, the recorded film can stably be kept in non-equilibrium phase state for a long time. Further, since the melting point thereof is lower than 800.degree. C., it is possible to record or erase information in or from the medium in response to a relatively small power laser beam.

REFERENCES:
patent: 3530441 (1970-09-01), Ovshinsky
patent: 3696344 (1972-10-01), Feinleib et al.
patent: 3971874 (1976-07-01), Ohta et al.

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