INFORMATION RECORDING MEDIUM, MASTERING DEVICE, IDENTIFICATION INFORMATION RECORDING DEVICE, IDENTIFICATION INFORMATION REPRODUCTION DEVICE, MASTERING METHOD, IDENTIFICATION INFORMATION RECORDING METHOD, AND IDENTIFICATION INFORMATION REPRODUCTION METHOD

摘要

Identification information is recorded by applying a laser beam to a predetermined area of an information recording medium so that a land is surely made into a pit. A pair of land and pit is formed in a predetermined area of an information recording medium. Moreover, the laser used for recording identification information is applied the pair. Accordingly, by applying a laser to this area, a land serving as one of the pair is surely made into a pit and identification information can surely be recorded by applying a laser beam to the predetermined area. It should be noted that the remaining pit of the pair remains as a pit even when the laser is applied. Moreover, the laser may not be applied to this pit.