Optical information storage material

Details Optical information storage material Optical information storage material

1985-02-11

1986-10-07

Goodrow, John 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

430417, 430495, G03F 702, G03C 100

Patent

active

046159673

ABSTRACT:
A thin film device for recording information in readable form that decreases its light absorbancy in response to increased temperature. The film includes two elements from column IVa of the Periodic Table, such as silicon, germanium, tin and lead, bound with one of or a mixture of sulfur and selenium.
The as-deposited inventive materials contain tetrahedral units, some ethane-like units and some rings and chains. Upon heating the ethane-like units are converted to rings and chains and tetrahedral units producing a dramatically decreased light absorbancy. The materials are stable at relatively high operating temperatures.

REFERENCES:
patent: 3716844 (1973-02-01), Brodsky
patent: 3801966 (1974-04-01), Terao
patent: 4183094 (1980-01-01), Keezer et al.
patent: 4199357 (1980-04-01), Yoshida et al.
patent: 4286045 (1981-08-01), Nahara et al.
patent: 4499178 (1985-02-01), Wada

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