Optical storage medium of limiting play times
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United States of America Patent
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Issued Date -
Feb 26, 2004
app pub date -
Oct 17, 2002
filing date -
Aug 22, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An optical data storage medium includes a first substrate, the first substrate including a plurality of first data structures; a second substrate positioned above the first substrate, the second substrate including a plurality of second data structures; a reflective layer positioned on the second substrate to cover the second data structures; and a masking layer interposed between the reflective layer and the first substrate to cover the first data structures, the masking layer having a varying reflectivity to thereby render the second data structures unreadable.
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