Phase change optical recording medium
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United States of America Patent
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Oct 25, 2005
Grant Date -
Jan 29, 2004
app pub date -
Jul 21, 2003
filing date -
Jul 22, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A phase change optical recording medium having a wide recording power margin and excellent durability to repetitive recording is disclosed. The medium includes a first protective layer, a recording layer, an interface layer, a second protective layer, and a reflective layer, the layers disposed on a transparent substrate, wherein the interface layer includes a mixture of ZrO2. Preferably, the medium further includes a second interface layer including the mixture of ZrO2 between the first protective layer and the recording layer. In another preferable aspect, the mixture of ZrO2 is represented by the following formula:
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