Patent ID: 7129019

Claim:
An optical information recording medium comprising: a substrate including a groove with a track pitch of 200 to 400 nm and a groove depth of 20 to 150 nm and having successively disposed on a surface thereof a light reflective layer, a recording layer containing a dye in which information is recorded by irradiation with a laser beam having a wavelength of no greater than 450 nm, adhesive layer, and a cover layer with a thickness of 0.01 to 0.5 mm, at least one overcoated layer, containing a radiation-curable resin, disposed on the cover layer, wherein a surface of the optical information recording medium on a side disposed with the cover layer has a center surface average roughness (SRa 1 ) of no greater than 3.0 nm when measured over a large surface area and a center surface average roughness (SRa 2 ) of no greater than 3.0 nm when measured over a minute surface area.