| 摘要 |
The subject invention achieves further improvement in recording density for an optical information recording medium using a medium super-resolution effect with a super-resolution film, by reduction of the effective spot diameter in a further effective way. According to the optical information recording medium of the present invention, information is recorded on a recording surface of a substrate 5 in the form of phase pits. On the recording surface, an information layer 4 , composed of a reflection film 6 , a light-absorbing film 3 and a temperature-responsive film 2 , is formed. The temperature-responsive film 2 is made of a ZnO film, which is an inorganic super-resolution film whose complex refractive index changes according to intensity of incident light, the film is also superior in a light transmittance property. The light-absorbing film 3 is made of an Si film 3 , which absorbs a part of the incident light so that the temperature of the information layer 4 increases. The reflection film 6 is made of an Al film.
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