Optical disk substrate

Details Optical disk substrate Optical disk substrate

1987-10-05

1989-01-31

Stephan, Steven L.

Dynamic information storage or retrieval

Storage medium structure

Layered

369272, 369279, 369286, G11B 724, G11B 700, G11B 2504

Patent

active

048021601

ABSTRACT:
An optical disk substrate has a surface on which a pre-groove for light beam tracking is formed. Non-pregrooved regions on the substrate surface on which the pregroove is formed are subjected to surface roughing processing to improve adhesion of the substrate surface in the non-pregrooved regions to a film which is to be overlaid on the optical disk substrate.

REFERENCES:
patent: 4710913 (1987-12-01), Matsushima et al.
patent: 4720826 (1988-01-01), Sugiyama et al.

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