| 摘要 |
<P>PROBLEM TO BE SOLVED: To raise signal quality by reducing crosstalk by multiple reflection lights in an optical recording medium which has three or more information recording layers. <P>SOLUTION: In the optical recording medium 30 which has three or more information recording layers, refractive indices of a plurality of intermediate layers 33, 34 and 35 arranged between adjoining information recording layers, are made larger than the refractive index of a cover layer 32 arranged between a light incidence surface 30z and the information recording layer 30a nearest to this light incidence surface 30z. <P>COPYRIGHT: (C)2011,JPO&INPIT |
