Manufacture of optical data storage disc
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 26, 2000
Grant Date -
N/A
app pub date -
Mar 1, 1999
filing date -
Jan 23, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus forming a micro-relief pattern on a surface of an optical disc, which micro-relief pattern may form a holographic image in which a shim bearing a micro-relief pattern is pressed onto the surface of the disc and the apparatus used ensures that a greater force is applied to the periphery of the disc and the remainder of the surface on which it is desired to form the micro-relief pattern, such method and apparatus enables a satisfactory relief pattern to be formed over a substantial area of the surface of the disc.
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