Optically readable information disk and method of manufacturing

Details Optically readable information disk and method of manufacturing Optically readable information disk and method of manufacturing

1982-03-04

1984-10-16

Bleutge, John C.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

264 14, 264 22, 264107, 264 22, 369 19, 369275, C08F 250, G11B 2300, G11B 726, G11B 724

Patent

active

044773285

ABSTRACT:
The invention relates to an optically readable information disk, a method of manufacturing same, as well as a device for carrying out the method, in which the information disk which comprises an optically readable information track of information areas situated at a higher and a lower level, is manufactured entirely from a radiation-cured layer of a lacquer containing oligomeric acrylates or methacrylates which on an average per molecule comprise between one and four acrylate groups or methacrylate groups, has a viscosity of 1,000-15,000 cP and comprises a photoinitiator in a concentration of 0.1 to 0.5% by weight. Suitable lacquers comprise notably 1,1'-isopropylene-bis(p-phenoxyethylmethacrylate) or 1,1'-isopropylene-bis(p-phenoxyethylacrylate).

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patent: 4188433 (1980-02-01), Dijkstra et al.
patent: 4275091 (1981-06-01), Lippits et al.
patent: 4312823 (1982-01-01), Kraakman et al.

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