Fabricating optical record media
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United States of America Patent
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-
Oct 28, 1986
Grant Date -
N/A
app pub date -
Apr 15, 1985
filing date -
Apr 15, 1985
priority date (Note) -
Expired
status (Latency Note)
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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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