Optical disk with glass substrate and method of producing same

Details Optical disk with glass substrate and method of producing same Optical disk with glass substrate and method of producing same

1991-04-18

1992-07-07

Levy, Stuart S.

Dynamic information storage or retrieval

Storage medium structure

Specific disc profile

369284, 369286, 3692755, 3461351, G11B 370, G11B 584, G11B 726, G01D 900

Patent

active

051289229

ABSTRACT:
An optical disk with a substrate made of glass at least partially has its inner and outer peripheral surfaces polished to surface roughness of 5 .mu.m or less so as to reduce the amount of glass powder generated from these surfaces and to thereby improve the yield.

REFERENCES:
patent: 3673746 (1972-07-01), Highberg
patent: 4546464 (1985-10-01), Inoue et al.
patent: 4678547 (1987-07-01), Miyamoto et al.
patent: 4802160 (1989-01-01), Yamada et al.

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