To provide an optical recording medium with improved recording characteristics which comprises a plurality of recording layers arranged on a transparent substrate.
The optical recording medium 300 comprises two recording layers (a first recording layer 302 and a second recording layer 305) which are arranged on a first substrate 301 and into or from which information can be recorded or reproduced by light irradiated thereon and an intermediate layer 304 arranged between the two recording layers. A certain groove for a recording track is formed in a surface of the intermediate layer 304 which is opposite to the surface on the first substrate 301 side and the intermediate layer 304 is composed of a plurality of resin layers (a first resin layer 304a, a second resin layer 304b, ..., and the outermost resin layer 304c). When the resin layer forming the certain groove for a recording track is made the outermost resin layer 304c, the outermost resin layer 304c is made of a resin having an elastic modulus different from those of the other resin layers of the intermediate layer 304.
| JPH11167749 | OPTICAL DISK |
| JP2005116009 | OPTICAL RECORDING MEDIUM |
| JPH0547032 | OPTICAL DISK AND PRODUCTION THEREOF |
NODA YOSHIHIRO
FUROMOTO SHIGEYUKI
| JP2003272237A | 2003-09-26 | |||
| JP2002092956A | 2002-03-29 |
Jiro Kobe