Patent ID: 8537653
Filing Date: 2013-09-17
Classification: G11B

Abstract:
1. An optical information recording medium including: at least one recording layer in which recorded marks are formed; a super-resolution functional layer, disposed adjacent the recording layer, for being irradiated by a laser beam focused by a focusing optical system thereby to allow detection of the recorded marks being smaller than a diffraction limit determined by optical performance of the focusing optical system and a wavelength of the laser beam; and a light transmitting layer covering the recording layer and the super-resolution functional layer, for transmitting the laser beam focused by the focusing optical system; wherein: the light transmitting layer has a light incidence surface on which the laser beam is incident; and if the distance between the light incidence surface and the recording layer is K, the thickness of a cover layer covering a recording layer in a prescribed optical disc is D, the optical information recording medium has a tilt margin with a limit value of θ