| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical information recording medium which is high in productivity and is prevented from curvature. <P>SOLUTION: The optical information recording medium has: at least an information recording layer; an adhesive layer; and a transparent sheet in this order on one face side of a substrate, and at least a label layer on the other face side. A thermal expansion coefficient of the transparent sheet is 40 ppm/°C or higher, and a moisture swelling coefficient of the transparent sheet is 30 ppm/% or higher. One face side of the label layer is provided with a coated layer having a thermal expansion coefficient of 40 ppm/°C or higher, and a moisture swelling coefficient of 30 ppm/% or higher. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
