| abstract |
An information-recording medium having a substrate and a recording part formed on the substrate allowing three-dimensional formation of recording pits, the recording part, comprising multiple recording layers, in which the recording pits are formed with a converged recording light at a wavelength of λ 2 and reproduced with a converged reproducing light with a wavelength λ 1 shorter than the wavelength λ 2 , and intermediate layers alternately laminated between the recording layers, wherein the reflectance at the recording light wavelength of λ 2 in the unrecorded region is smaller than the reflectance at the reproducing light wavelength of λ 1 in the unrecorded regions of the recording layers. |