Optical data storage compact disc and method for manufacturing the same
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United States of America Patent
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Jul 2, 1996
Grant Date -
N/A
app pub date -
Apr 7, 1994
filing date -
Oct 19, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical data storage disc, for example, a compact disc, has one side formed with a pattern of indentations defining a digital data recording, and this side is metallized and further coated with a layer, which is embossed with a relief pattern defining a holographic image. The hologram may extend across the whole surface of the disc and is visible from the top side of the disc, while digital information is readable in a conventional manner using a laser directed at the underside of the disc.
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