Modulated groove records with a thick metal layer and method for

Details Modulated groove records with a thick metal layer and method for Modulated groove records with a thick metal layer and method for

1976-03-05

1979-04-03

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791004C, 274 46C, 204 5, 204 38A, H04N 576, G11B 370

Patent

active

041480678

ABSTRACT:
A modulated groove record, such as a video disc, has a coating on a conductive layer bearing the modulated groove formed from the material of the layer. The material may be aluminium and the coating may be a uniform dielectric of aluminium oxide formed by anodizing. The groove may be impressed in the aluminium surface by applying a matrix to an aluminium/plastics laminate forcefully and rapidly so that the aluminium yields while the plastic appears rigid. The aluminum layer thickness is at least twenty times the depth of the groove.

REFERENCES:
patent: 3072543 (1963-01-01), Lubow
patent: 3783196 (1974-01-01), Stanley
patent: 3833408 (1974-09-01), Matthies
patent: 3842194 (1974-10-01), Clemens
patent: 3842217 (1974-10-01), Clemens
patent: 3900370 (1975-08-01), Germscheid
patent: 3982066 (1976-09-01), Nyman

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