| 摘要 |
An optical information recording medium comprises a plurality of recording layers, and intermediate layers provided between the plurality of recording layers. The optical information recording medium has a recess for use in tracking, in a layer which is provided in a position farther, than the plurality of recording layers, from a light-incident side on which a beam emitted for recording/reading enters. A depth D of the recess is lambda/4n where lambda is a wavelength of the beam emitted for recording/reading, n is a refractive index of a layer with which the recess is filled.
|
