Process of manufacture of a master disk and/or of an optical disk
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United States of America Patent
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Apr 22, 1997
Grant Date -
N/A
app pub date -
Feb 21, 1995
filing date -
Feb 21, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a preformatted substrate, a preformatted substrate comprising information to be duplicated, as well as their processes of manufacture and a process of manufacture of a master disk and/or an optical disk. The preformatted substrates are constituted of a support coated with a layer of resin sensitive to at least one stress comprising on its surface a first succession of micropits or first groove representative of the preformatting signal, the depth of these micropits or groove being smaller than the thickness of the layer of photosensitive resin. These substrates may be used in the field of information archiving and in the field of manufacture of optical disks.
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