Patent ID: 8795805

Claim:
An optical disc recording medium comprising: a disc substrate; at least one recording layer disposed on a surface side of the disc substrate; a cover layer disposed on a laser incident surface side of the recording layer and composed of a light-transmissive resin layer; and a hard coat layer disposed on a laser incident surface side of the cover layer and composed of a light-transmissive resin, the hard coat layer having a thickness that increases from the central portion to the peripheral portion of the optical disc in a range of one to three micrometers, wherein the cover layer is formed such that the thickness of the cover layer decreases from the central portion to the peripheral portion of the optical disc, wherein the total thickness of the cover layer and the hard coat layer is substantially uniform from the central portion to the peripheral portion of the optical disc, and the cover layer comprises a combination of an ultraviolet (UV)curable resin and a polycarbonate sheet or a combination of an adhesive layer and a polycarbonate sheet.