| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable stable recording and reproducing of an optical information recording medium even at a low temperature by suppressing the change of warpage of the optical information recording medium. <P>SOLUTION: In the optical information recording medium which includes a substrate, three or more information signal layers formed on the substrate, two or more intermediate layers interposed between the three or more information signal layers, and a light transmission layer formed on the information signal layer in a position farthest from the substrate, a storage elastic modulus at -5°C of the light transmission layer is 1,500 MPa or less, each storage elastic modulus at -5°C of the two or more intermediate layers is 2,860 MPa or more and 2,950 MPa or less, and each storage elastic modulus at 25°C of the two or more intermediate layers is 1,850 MPa or more and 2,440 MPa or less. <P>COPYRIGHT: (C)2012,JPO&INPIT |
