Contrast Enhancement for Optical Recording
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United States of America Patent
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Issued Date -
Apr 26, 2007
app pub date -
Oct 20, 2005
filing date -
Oct 20, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A recordable medium includes an inscription layer and a contrast enhancing layer. The inscription layer has at least two sub-layers that combine upon application of a write power, the inscription layer having a reflectivity R1 before application of the write power and a reflectivity R2 after application of the write power. The contrast enhancing layer does not combine with the sub-layers of the inscription layer upon application of the write power. The contrast enhancing layer and the inscription layer together have a reflectivity R3 before application of the write power and a reflectivity R4 after application of the write power, and |R4−R3|>|R2−R1|.
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