Patent ID: 7778145

Claim:
An optical recording medium comprising: a substrate having a guide groove formed therein; a layer having at least a light reflection function on the substrate; a recording layer containing, as a main component, a dye having a light absorption function with respect to a recording/reading light wavelength in an unrecorded state; and a cover layer which makes the recording/reading light incident on the recording layer, in this order, wherein, when a guide groove part on a far side from a plane of incidence of a recording/reading light beam, which is obtained by focusing the recording/reading light, on the cover layer is set as a recording groove part, reflected light intensity in a recorded pit portion formed in the recording groove part is set higher than reflected light intensity in an unrecorded recording groove part, and a recording layer thickness d G in the unrecorded recording groove part is not less than 5 nm and less than 50 nm.