THREE-LEVEL RECORDING PHASE-CHANGE OPTICAL DISC
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United States of America Patent
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Issued Date -
Feb 19, 2009
app pub date -
Oct 29, 2007
filing date -
Aug 16, 2007
priority date (Note) -
Abandoned
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Abstract
A three-level recording phase-change optical disc including a first recording layer, a second recording layer, a third recording layer, a reflective layer, and a dielectric layer is provided. The first recording layer, the second recording layer, and the third recording layer can form three recording regions with three different reflective indexes respectively so as to increase the recording density of the optical disc.
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