Optical information recording material and method of recording a

Details Optical information recording material and method of recording a Optical information recording material and method of recording a

1979-08-08

1981-07-14

Fears, Terrell W.

Stock material or miscellaneous articles

Composite

Of quartz or glass

365106, 365127, 346 76L, C23C 304

Patent

active

042787343

ABSTRACT:
An optical information recording material comprising a thin film of a suboxide of a metal or semimetal of Group IIIB, IVB, VB or VIB, e.g. TeO.sub.x where x<2.0 or BiO.sub.x where x<1.5, added with up to 50 mole % of S and/or Se. When irradiated with light of relatively low energy density, the thin film exhibits such changes in optical density that information can be optically recorded on this material with high contrast ratio. Recorded information can be reproduced by either transmitted light or reflected light and, when desired, can be erased by light irradiation of adequate energy density.

REFERENCES:
patent: 3761942 (1973-09-01), Lorenz et al.
patent: 3971874 (1976-07-01), Ohta et al.

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