Method for manufacturing an optical recording film composed of a

Details Method for manufacturing an optical recording film composed of a Method for manufacturing an optical recording film composed of a

1993-10-05

1996-02-13

Owens, Terry J.

Coating processes

Coating by vapor, gas, or smoke

Mixture of vapors or gases utilized

427162, 427166, 4272557, 20419226, 3461351, 369288, 430321, 430945, C23C 1424, C23C 1434

Patent

active

054910030

ABSTRACT:
An optical recording medium having a recording film composed of a mixture of a metal and an oxide or alternating layers of a metal and an oxide is formed by vacuum evaporation or sputtering from separate metal and oxide sources without inducing an oxidation-reduction reaction between the metal and oxide. The oxide has a standard enthalpy of formation which is higher than that of an oxide obtained by oxidizing the metal. Information is recorded by irradiating portions of the film with a laser beam so as to cause an exothermic oxidation-reduction reaction between the metal and oxide, thereby causing an optically detectible change in the optical constant of the film at the portions irradiated.

REFERENCES:
patent: 4091171 (1978-05-01), Ohta et al.
patent: 4640860 (1987-02-01), Ritchie
patent: 4651172 (1987-03-01), Watanabe
patent: 4902584 (1990-02-01), Uchiyama et al.
patent: 4916048 (1990-04-01), Yamada et al.
patent: 5080947 (1992-01-01), Yamada et al.

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