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 irradiating a laser beam to a predetermined area of an information recording medium by securely changing a land to a pit. A pair of land and pit is formed in the predetermined area of the information recording medium. A laser beam is irradiated to this pair to record the identification information. Accordingly, by applying a laser beam to this area, a land serving as one of the pair is surely changed to a pit so that the identification information can surely be recorded by irradiating a laser beam to the predetermined area. The remaining pit of the pair remains as a pit even when the laser beam is irradiated. Moreover, the laser beam may not be irradiated to the pit.