Fabricating optical record media

Details Fabricating optical record media Fabricating optical record media

1985-04-15

1986-10-28

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

Utilizing surface to be reproduced as an impression pattern

756643, 7562728, 7562755, 264 13, 264 25, 264 22, 264 25, 264 81, 264106, 264132, 264265, 264310, 430 5, 430140, 430269, B29C 3342

Patent

active

046198040

ABSTRACT:
A process for making at least a single-faced, write and/or read optical disk having a sub-layer with a smooth or high-resolution featured surface and the opaque, substantially flat substrate includes the steps of interjecting between the opaque, substantially flat substrate and a transparent, highly polished or featured master mold, a thin layer of viscous composition which is radiation-curable to a solid plastic without undergoing significant shrinkage. The layer of viscous composition is irradiated through the transparent mold to cure the composition to a solid plastic sub-layer having the desired smooth or high-resolution featured surface. After irradiation of the composition, the master mold is removed, leaving the cured plastic sub-layer adhered to the substrate. The substrate is preferably metal, such as aluminum, and the master is preferably glass with an etched featured surface thereon.

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