Sandwich-type capacitive electronic discs
AssigneeRCA Corporation
InventorsWolfgang H. Meyer, Hanspeter Schweizer
Life of this patent
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Abstract
At least one layer of a conductive organic polymer, formed by electropolymerization on the anode in a two electrode cell, is bonded to a plastic substrate by compression with sufficient heat and pressure to cause it to bond to the substrate and release from the anode. Improved sandwich-type capacitive electronic discs having an information pattern in ultra thin outer conductive layers which are homogeneous and which contain no conductive particles are formed by this process by providing as the anode a mastering disc containing an information pattern which is the negative of the desired information pattern.
Claims20
A method of forming a structure comprising a plastic substrate having on a surface a layer of a conductive organic polymer, said method comprising electropolymerizing a composition comprising a suitable organic monomer, an electrolyte salt and a suitable solvent to form said conductive layer on the anode in a two electrode cell and compressing the coated anode against the substrate with sufficient heat and pressure to cause the layer to bond to the substrate and release from the anode.
A high density information disc suitable for capacitive playback comprising a plastic core disc having on at least one major surface thereof a conductive layer containing an information pattern, said layer being formed by the electro-polymerization of pyrrole onto a substrate having a surface relief pattern which is the negative of said information pattern, thereby producing said information pattern in said layer as it is formed, said layer being free of particulate filler.
Dependencies are inferred from the claim text.