Patent ID: 7245578

Claim:
An optical recording medium, having at least a light-transmitting layer covered with a recording layer formed on a support substrate, for recording information on the recording layer by a laser beam incident from the light-transmitting layer, wherein the recording layer is provided with a heat sink layer on its light-transmitting layer side, the heat sink layer being made of a material having a thermal conductivity of greater than 1 W·m −1 ·K −1 , and the heat sink layer is set so that Pmax>Pmin×2.2, where Pmax and Pmin are maximum and minimum limit powers of a laser beam having a wavelength of 450 nm or less, respectively, at which a playback jitter value is less than 13% when reproducing information that has been recorded onto the recording layer by being irradiated with the laser beam via a radiation optical system with an objective lens having a numerical aperture of 0.7 or more.