INFORMATION RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME, AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE

摘要

An information recording medium of the present invention is an information recording medium characterized by and including a substrate; and a recording unit capable of recording three-dimensionally a recording pit on the substrate; in which the recording unit has n number of recording layers (n is an integer equal to or larger than 4) and a plurality of intermediate layers laminated with the recording layers one on another; the recording is performed by the condensed recording light using a two photon absorption phenomenon; each of the plurality of intermediate layers is substantially transparent at a wavelength lambda1 of the recording light and at a wavelength lambda2 of the reproduction light, respectively; the light intensity of the recording light incident into the recording layer nearest to the substrate is more than 0.707 fold as much as the light intensity of the recording light incident into the recording layer farthest from the substrate. The information recording medium is an information recording medium capable of maintaining a precise and good recording accuracy at the recording layer positioned lower away from the objective lens while it secures the focus servo reflected light.