| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical information recording medium that can prevent deformation (warpage), accompanying temperature and humidity changes. <P>SOLUTION: This optical information recording medium 10 has a transparent substrate 20, a thin-film layer 40 formed on the substrate 20 and including a recording film 42, and a thin-film protective film 50 formed on the layer 40, and this recording medium 10 also has a substrate protective film 30 formed on the substrate 20. The neutral surface of deformation, caused by temperature changes in the recording medium 10, is located in the thin-film layer 40. <P>COPYRIGHT: (C)2003,JPO |
