Optical recording medium

Details Optical recording medium Optical recording medium

1992-03-23

1995-11-21

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430945, 269287, 269284, G11B 724

Patent

active

054685931

ABSTRACT:
A tape-shaped optical recording medium, in which a recording layer capable of optically recording or reproducing information signals is formed on a flexible base, is disclosed. A protective film formed of a soluble high polymer having a contact angle with respect to water of not less than 100.degree. C. and a glass transition temperature of not lower than 100.degree. C. is formed on the recording layer. The soluble high polymer may be a fluorine-based polymer, such as a tetrafluoroethylene-dioxole copolymer. The protective film has a film thickness in a range of from 0.25 .lambda.
to 0.5 .lambda.
, where .lambda. is a wavelength of a playback light and n is a refractive index of the protective film.

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patent: 4945249 (1991-01-01), Kamezaki et al.
patent: 5002463 (1991-03-01), Dust et al.
patent: 5013594 (1991-05-01), Mizumura et al.
patent: 5236755 (1993-08-01), Howe et al.

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