| 简介 |
PROBLEM TO BE SOLVED : To provide a read-only optical information recording medium which comprises a reflective film having a reflectance suitable for use as a reflective film for an optical information recording medium (e.g., BD-ROM) and having excellent reproduction stability and durability.
SOLUTION : The read-only optical information recording medium includes a reflective film 2. The reflective film comprises an Al-based alloy containing Si and/or Ge in an amount of 5 to 40 at.% and a high melting point metal element and/or a rare earth element (preferably at least one or more elements selected from the group consisting of Ti, Fe and Mn) in an amount of 0.7 to 5 at.%.
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