Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product
Patent
1990-07-02
1992-11-17
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
430270, 430945, 346 76L, G03C 100, G03C 1725
Patent
active
051642905
ABSTRACT:
An optical recording medium of the type whereby information is recorded and reproduced by utilizing a change of the reflectance of an irradiated portion, caused by irradiating a recording film formed on a substrate with laser beams is described. The recording film in this optical recording medium has a three-layer structure comprised of a layer containing at least tin and selenium and layers of a passive state-forming metal or an oxide thereof, contiguous to both sides of said layer containing tin and selenium. A film of a phthalocyanine compound having a light transmission of at least 80% at a wavelength of 770 to 850 nm is disposed between the recording film and the substrate.
REFERENCES:
patent: 4740447 (1988-04-01), Itoh et al.
patent: 4763139 (1988-08-01), Itoh et al.
patent: 4973520 (1990-11-01), Takada et al.
Kono Michihiro
Sigeta Sadaaki
Takada Hirokazu
Bowers Jr. Charles L.
Chea Thorl
Dainippon Ink and Chemicals Inc.
NKK Corporation
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