OPTICAL INFORMATION RECORDING MEDIUM
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United States of America Patent
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Issued Date -
Jun 10, 2010
app pub date -
Apr 10, 2008
filing date -
Apr 13, 2007
priority date (Note) -
Abandoned
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Abstract
There is provided a read-only optical information recording medium including a reflective film which has high reflectivity, and is superior in environment resistance at the time of being kept in a high-temperature, high humidity environment as well as light resistance at the time of being kept in a high-intensity light irradiation environment and repeating reproduction durability against a repeating reproduction test. In a read-only optical information recording medium in which at least one reflective film and at least one light transmissive layer are laminated in order on a substrate, the reflective film is made of a Ag-base alloy including 0.01 to 1.0 at % of Bi and 0.1 to 13.0 at % of Cu.
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