| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical information recording medium having two recording layers, less layers which constitute the medium, excellent productivity and high reliability. <P>SOLUTION: In an optical disk 101 having first and second information layers 50 and 51 via an optical separation layer 21, the first information layer 50 provided in a position near the incident surface side of a laser beam L has a first dielectric layer 2, a recording layer 4, a second dielectric layer 6, a metal semitransmission layer 7 and a transmittance adjusting layer 8 which are laminated in this order, the first dielectric layer 2 includes a sulphide, the second dielectric layer 6 includes no sulphide and the refractive index of the second dielectric layer 6 is equal to or higher than that of the first dielectric layer 2. <P>COPYRIGHT: (C)2007,JPO&INPIT |
