Method for affixing information on read-only optical discs

Details Method for affixing information on read-only optical discs Method for affixing information on read-only optical discs

1989-07-14

1990-10-02

Reinhart, Mark J.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76L, 369273, G01D 900

Patent

active

049610775

ABSTRACT:
A read-only optical recording disc comprising a substrate, a metal reflective layer and an overlying protective layer, at least one of the substrate and the protective layer being light-transmissive, is marked by means of a pulsed scanning laser beam which transmits light in a patterned array through a transparent layer of the medium and indelibly marks the reflective layer of the medium without disrupting the surface continuity of the substrate and protective layer.

REFERENCES:
patent: 4066268 (1978-01-01), Borchard et al.
patent: 4504548 (1985-03-01), Esho
patent: 4580146 (1986-04-01), Nakao
patent: 4652498 (1987-03-01), Wolf

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