Optical recording medium with a thick overcoat

Dynamic information storage or retrieval – Storage medium structure – Optical track structure

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Details

3461351, 369284, 369288, G11B 724

Patent

active

043409598

ABSTRACT:
The invention is an improved optical recording medium and a method for making same in which the substrate has a raised center and peripheral portions. The sides of the raised portions and the upper surface of a light absorptive layer, which overlies the unraised portion, form a mold which is filled with the overcoat material.

REFERENCES:
patent: 2313851 (1943-03-01), Van Deventer
patent: 2340161 (1944-01-01), Van Deventer
patent: 4023185 (1977-05-01), Bloom et al.
patent: 4074282 (1978-02-01), Balas
patent: 4097895 (1978-06-01), Spong
patent: 4101907 (1978-07-01), Bell et al.
patent: 4170616 (1979-10-01), Jebens

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