Patent ID: 7459194

Claim:
An optical information recording medium including an optical information recording layer on which information is recorded by light energy, a reflecting layer reflecting light and a super-resolution layer reducing a diameter of a beam of light applied thereto which are formed on a substrate, wherein the optical information recording medium comprises a metal oxide or compound semiconductor, and wherein the super-resolution layer of the recording medium has a wavelength λg corresponding to band gap energy Eg in stationary state and a difference Δλ=λ−λg from a wavelength λ of a laser beam to be irradiated on the optical information recording medium for information read/write is more than −100 nm to less than 60 nm, and a transmittance T 0 of the material in the stationary state at the wavelength λ changes to a transmittance T such that an expression ΔT=|T−T 0 |/T 0 ×100 becomes over 10%; wherein the super-resolution layer is formed of a mixture of Fe 2 O 3 and one selected from Cr 2 O 3 , CeO 2 , MnO, ZnO, NiO, CoO, MgO, CuO, BaO, Y 2 O 3 and CdO.