INFORMATION RECORDING MEDIUM, MASTERING APPARATUS, IDENTIFICATION INFORMATION RECORDING APPARATUS, IDENTIFICATION INFORMATION REPRODUCING APPARATUS, MASTERING METHOD,IDENTIFICATION INFORMATION RECORDING METHOD, AND IDENTIFICATION INFORMATION REPRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To record identification information by reliably changing a land into a pit while the prescribed region of an information recording medium is irradiated with a laser beam.;SOLUTION: The land and the pit are formed as a pair in the prescribed region of the information recording medium. The pair is irradiated with the laser beam for recording identification information. Since the land to be either of the pair is surely changed into the pit by irradiating the region with the laser beam, the identification information can be reliably recorded while the prescribed region is irradiated with the laser beam. The remaining pit of the pair is as it is even when being irradiated with the laser. The pit may be or may not be irradiated with the laser beam.;COPYRIGHT: (C)2006,JPO&NCIPI