Patent ID: 6168844
Filing Date: 2001-01-02
Classification: G11B,Y10S,Y10T

Abstract:
An optical information recording medium comprising: a transparent substrate having a pre-groove formed thereon; a light absorbing layer established on the substrate and comprising a light absorbing material, constituted from a dye which absorbs the recording laser beam; and a light reflecting layer established on the light absorbing layer and which reflects the laser beam; wherein information is recorded through the shining of said recording beam on said light absorbing layer; 0.13.ltoreq.A.ltoreq.0.21 where A (Abs) is the absorbency of said light absorbing layer at the wavelength of said recording beam which is incident upon the light absorbing layer through the substrate with the pre-groove; and 6.0.ltoreq.k.dav.ltoreq.12.0 where k is the imaginary number portion of the complex index of refraction of the film in said light absorbing layer and dav (nm) is the mean film thickness of the light absorbing layer, at the wavelength of said recording beam.