Optical recording medium and optical recording method

Details Optical recording medium and optical recording method Optical recording medium and optical recording method

1993-11-05

1996-12-03

Hess, B. Hamilton

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428195, 428209, 428457, 428913, 430945, B32B 300

Patent

active

055806317

ABSTRACT:
An optical recording medium comprises a light transmissive substrate, a record film formed on a surface of the base plate, the record film containing phthalocyanine as a coloring matter, a light-reflection film formed on a surface of the record film, and a protection film formed on a surface of the light-reflection film, the protection film having a thickness capable of preventing the light-reflection film from braking by a deformation thereof in directions to the light-reflection film and the protection film due to a formation of a pit in the record film. The data is recorded in the recording medium by irradiating a light from a side of the light transmissive substrate, melting and sublimating phthalocyanine in the record film to effect the deformation to the directions of the substrate, the light-reflection film and the protection film, and forming a cavity in the substrate and a capsule portion in the record film to cover the cavity, the capsule portion having a composition different from that of the record film.

REFERENCES:
patent: 5190800 (1993-03-01), Yamada et al.
patent: 5204220 (1993-04-01), Yanagisaua et al.
patent: 5238723 (1993-08-01), Yoshizawa et al.

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