Multilayer optical disk, and method and device for recording optical information thereon

摘要

A disc capable of reproducing an address signal and a data signal correctly even by using a multilayer optical disc that includes a plurality of recording reproduction surfaces bonded together in a state in which front positions in sectors of the respective recording reproduction surfaces do not match completely, a method and a device are provided. In one embodiment, a relationship between a bonding precision L and a length G of a gap area is determined to be L<=G. In another embodiment, by recording information in a range of a length corresponding to the bonding precision L not only in the data area but also in the gap area, a data recording starting position and a data recording ending position for each sector of the respective recording reproduction surfaces are matched. In yet another embodiment, guard areas are provided in a tip portion and a back end portion of the data area.