Patent ID: 8000192

Claim:
A cutting apparatus comprising: a signal processor that generates a series of predetermined signal units including a signal part resulted from FSK modulation of information bit and one or more signal parts of a single frequency, when the FSK modulation is an MSK (minimum shift keying) modulation; a drive signal generator that generates a drive signal on the basis of the signal supplied from the signal processor; a laser source means; a deflector that deflects laser light from the laser source means on the basis of the drive signal from the drive signal generating means; and a controller that controls the signal processor, drive signal generator, and laser source to cut a disc substrate by radiating the laser light to the disc substrate through the deflector means to form, on the disc substrate, a wobbled track including the series of predetermined units each composed of the FSK information bit part based on a waveform resulted from FSK modulation of the information bit and the one or more single-frequency parts based on the waveform of the single frequency.