Optical data storage medium
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United States of America Patent
Stats
-
May 22, 1990
Issued Date -
N/A
app pub date -
Feb 8, 1988
filing date -
Sep 27, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data storage medium is provided which is suitable for production or replication by moulding, casting, embossing or a similar process against a tool. The data storage medium comprises an optically sensitive layer at or adjacent to one surface of the medium, said one surface of the medium comprising a plurality of topographical features or structures disposed in a regularly repeating pattern, said pattern being free from undercutting so that the medium can be produced and/or replicated by molding, casting, embossing or similar process against a tool. The optically sensitive layer is preferably overcoated with a thin film of a metallic material which conforms to the topography of said surface.
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