| 摘要 |
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 λ2 and reproduced with a converged reproducing light with a wavelength λ1 shorter than the wavelength λ2, and intermediate layers alternately laminated between the recording layers, wherein the reflectance at the recording light wavelength of λ2 in the unrecorded region is smaller than the reflectance at the reproducing light wavelength of λ1 in the unrecorded regions of the recording layers.
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