Method for the manufacture of a metallic recording substrate for

Details Method for the manufacture of a metallic recording substrate for Method for the manufacture of a metallic recording substrate for

1982-02-16

1983-09-06

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204281, C25D 110, C25D 120

Patent

active

044027982

ABSTRACT:
In accordance with the present disclosure recorded metallic recording substrates made of a relatively soft metal are coated with a conformal 200 to 400 angstroms thick layer of chromium, chromium oxide, or a mixture thereof, and then preferably passivated prior to being used as matrixes in the replication process.

REFERENCES:
patent: 2067502 (1937-01-01), Pollard
patent: 3904488 (1975-09-01), Nosker
patent: 4044379 (1977-08-01), Halter
patent: 4060831 (1977-11-01), Halter
patent: 4088544 (1978-05-01), Hutkin
patent: 4262875 (1981-04-01), Nyman et al.
J. K. Clemens, "Capacitive Pickup and the Buried Subcarrier Encoding System for the RCA VideoDisc", pp. 33-59, RCA Review, vol. 39, Mar. 1978.
E. O. Keizer, "VideoDisc Mastering", pp. 60-86, RCA Review, vol. 39, Mar. 1978.
I. Gorog, "Optical Techniques Developed for the RCA VideoDisc", pp. 162-185, RCA Review, vol. 39, Mar. 1978.

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