Limited play optical media device with barrier layers
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United States of America Patent
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May 29, 2007
Grant Date -
Aug 5, 2004
app pub date -
Sep 8, 2003
filing date -
Feb 3, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present disclosure relates to a limited play optical storage media and a method for limiting access to data thereon. This storage media includes a first substrate; a reflective layer; a data storage layer disposed between said first substrate and said reflective layer; a reactive layer comprising at least one reactive material disposed on said at least one reflective layer; an optically transparent second substrate disposed between the reactive layer and a laser incident surface of the optical storage media; and an oxygen permeable barrier layer disposed between the reactive layer and a laser incident surface of the optical storage media, said reactive layer having an initial percent reflectivity of about 50% or greater and a percent reflectivity of about 45% or less after exposure to oxygen.
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