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US 4,077,052 AGranted
Video disc capacitive recording means with a conductive bilayer
AssigneeRCA Corporation
InventorJohn Louis Vossen, Jr.
Life of this patent
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Abstract
This invention relates to a capacitive recording means comprising a video disc with a thin conductive bilayer on the surface of the disc wherein the bilayer is a first layer of copper and a second layer of an alloy of nickel, chromium and iron which contains oxygen. An inorganic dielectric layer is disposed on the conductive layer.
Claims11
A capacitive recording means comprising:
- a. a disc having a spiral groove on a face thereof with video information in the form of geometric variations in said groove;
- b. A thin conductive bilayer film on said face having a first layer of copper and a second layer of an alloy of nickel and chromium which contains up to about 10% by weight of iron and contains from about 5 to about 25 average atomic percent of oxygen;
- and
- c. an inorganic dielectric layer disposed on said conductive film.
1 more element
Dependencies are inferred from the claim text.