Patent ID: 7808881

Claim:
A method of manufacturing an optical recording medium, wherein the optical recording medium includes: a main-information area in which a reflection layer is formed on a substrate where a row of pits is formed as main data, and in which information is to be reproduced by irradiating the reflection layer with a beam of light having a wavelength of approximately 405 nm; and a sub-information area in which medium identification information is to be recorded by irradiating the reflection layer with a high-power laser to form a plurality of barcode patterns extending in a radial direction, the medium identification information individually identifying the optical recording medium, wherein a row of pits is formed on the substrate in the sub-information area, wherein the sub-information area is concentrically located closer to a center of the optical recording medium than the main-information area, wherein the method of manufacturing the optical recording medium comprises: a step of setting a range of a track pitch of the row of pits in the main-information area; a step of setting a range of a track pitch of the row of pits in the sub-information area; and a step of forming a track in the sub-information area and the main-information area, wherein the track pitch in the main-information area is at least 0.24 μm wide and at most 0.43 μm wide, and the track pitch in the sub-information area is at least 0.24 μm wide and at most 0.45 μm wide, and wherein the track pitch of the row of pits in the sub-information area is different from the track pitch of the row of pits in the main-information area.