Patent ID: 7948860

Claim:
An optical recording medium comprising: a substrate; a reflection film formed on the substrate, such that information is to be reproduced from the optical recording medium by irradiating the reflection film with a beam of light having a wavelength of about 405 nm; a main-information area where a row of pits is formed as main data; a sub-information area in which medium identification information is to be recorded in the reflection film partially as bar-code patterns, wherein the medium identification information is to be used to identify the optical recording medium individually; and a row of pits or a guide groove formed on the substrate in the sub-information area, such that a track pitch of the row of pits or the guide groove is at least 0.24 μm wide and at most 0.45 μm wide, wherein a shortest pit length of the pits formed in the main-information area is at least 0.12 μm wide.