Optical recording disc

Details Optical recording disc Optical recording disc

1979-11-29

1982-03-02

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

346 76L, 369275, 369284, 430945, G01D 1534

Patent

active

043181120

ABSTRACT:
An optical recording disc which comprises a disc-shaped substrate plate, for example, a plate manufactured from synthetic resin, for example, polymethylmethacrylate, which has on at least one side an ablative recording layer, for example, an amorphorous layer of a tellurium mixture, in which the substrate on the side of the recording layer has extrinsic instabilities, in particular surface discontinuities. For example, the surface of the substrate is roughened or provided with scratches. The substrate may also be provided with a separate coating layer comprising the discontinuities, for example, an inhomogeneous vapor-deposited layer, a coarse-granular layer of a dye, or a light-cured lacquer layer which has been roughened or provided with scratches.

REFERENCES:
patent: 3861952 (1975-01-01), Tokumoto
patent: 3889272 (1975-06-01), Lou
patent: 4032691 (1977-06-01), Kido
patent: 4175145 (1979-11-01), Fechter

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