Optical disk

Details Optical disk Optical disk

1990-06-07

1991-11-05

Ryan, Patrick J.

Firearms

428 65, 4284111, 428457, 428461, 428913, 369284, 369286, 369288, 346766, 3461351, 430945, B32B 302

Patent

active

050630962

ABSTRACT:
There is disclosed an optical disk having an optical reflectivity of 70% or above which comprises a substrate made of a thermoplastic saturated norbornene type polymer having a glass transition temperature of 100.degree. C. or above and a light reflecting layer formed by laminating, on said substrate, a multi-layer film constituted of at least one compound selected from the group consisting of metallic oxides and metallic fluorides.

REFERENCES:
patent: 4868261 (1989-09-01), Kobayashi et al.
patent: 4948856 (1990-08-01), Minchak et al.

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