| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical information recording medium which can obtain a good recording and reproduction signal and also can lower laser power during high speed recording, by a write-once optical information recording medium of a multilayered method. <P>SOLUTION: In the optical information recording medium having at least two recording layers containing a dyestuff formed on a substrate and an intermediate layer formed between respective recording layers, the extinction coefficient k<SB>0</SB>in the laser wavelength 660 nm of a first recording layer nearest to the substrate on the side in the recording layers where the laser beam is incident is k<SB>0</SB>≥0.01. <P>COPYRIGHT: (C)2007,JPO&INPIT |
