Telegraphy – Systems – Simplex-reversing periodic
Patent
1975-07-25
1976-09-21
Rutledge, L. Dewayne
Telegraphy
Systems
Simplex-reversing periodic
29195, 29199, 178 66A, 1791001B, B32B 1508
Patent
active
039820661
ABSTRACT:
An improved metal coating for a video disc of a grooved polymer disc, a conductive metal coating thereon and a dielectric coating on said metal coating comprising a trilayer film of a first layer of copper about 25-50 angstroms thick, a second layer about 200 angstroms thick of an alloy of nickel, and chromium and, optionally, iron, containing from about 20 to about 30 atomic percent of oxygen, and a third layer, of copper, about 25-50 angstroms thick.
REFERENCES:
patent: 3558290 (1971-01-01), Baier et al.
patent: 3842194 (1974-10-01), Clemens
patent: 3842217 (1974-10-01), Clemens
patent: 3843399 (1974-10-01), Kaplan et al.
patent: 3901994 (1975-08-01), Mehalso et al.
patent: 3909517 (1975-09-01), Clemens
Fisher Dennis Glendon
Nichols George Frederick
Nyman Frederick Russell
Vossen, Jr. John Louis
Bruestle Glenn H.
Morris Birgit E.
RCA Corporation
Rutledge L. Dewayne
Weise E. L.
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