Video record disc manufactured by a process involving chemical o

Details Video record disc manufactured by a process involving chemical o Video record disc manufactured by a process involving chemical o

1976-08-11

1977-11-08

Cannon, J.C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

96 36, 156659, 1791003V, 204192E, 204192EC, 428 64, 428203, 428209, 428210, 428222, B32B 300, C23C 1500, G11B 1112, G11B 2504, H04N 586

Patent

active

040578313

ABSTRACT:
A mother for manufacturing long-playing video records is provided by (1) selectively exposing a photoresist disposed as the outer layer on a substrate comprising a disc-shaped plate, a thin layer of base material, e.g., an oxide of nitride, adhering to the plate and a thin metal layer, e.g., chromium, silver, nickel or titanium, coating the base material layer, (2) removing non-activated sections of the photoresist layer and (3) sputter or chemically etching the thin metal and base material layers in sections corresponding to the removed sections of the photoresist layer.

REFERENCES:
patent: 3287563 (1966-11-01), Clunis
patent: 3534166 (1970-10-01), Korpel
patent: 3560280 (1971-02-01), Nishida
patent: 3642548 (1972-02-01), Eger
patent: 3688025 (1972-08-01), Whettemore
patent: 3919066 (1975-11-01), Bertens
patent: 3957609 (1976-05-01), Sasano
patent: 3984300 (1976-10-01), Ommeren
Davidse, J. Electrochem. Soc., 116(1), 100-103 (1/1969).
Rice et al, J. of S.M.P.T.E., 78(11), 997-1002 (1970).
Oliver, Def. Pub. Search Copy of Serial No. 571,633, Filed 8/10/66, Published in 856 O.G. 1019 on 11/26/68 Defensive Publication No. T 856,040 96-36.2.

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