Patent ID: 8179763
Filing Date: 2012-05-15
Classification: G11B

Abstract:
1. An information recording method using a multi-layered optical disc comprising first and second recording layers configured to record or reproduce information by light with a predetermined wavelength, the information configured to be recorded on the first or second recording layer using a mark and a space, wherein a channel clock period is represented by T, the channel clock period T being provided for recording the mark on the first or second recording layer where the mark regarding 3T can be recorded, a plurality of pulses including a last pulse arranged at an end of the pulses are used for recording the mark regarding 3T, in which a first subsequent level lower than a peak power level of the last pulse is arranged next to the last pulse, and a second subsequent level lower than the peak power level but higher than the first subsequent level is arranged next to the first subsequent level, and the optical disc is configured to store the information recording method comprising: recording the information on the first or second recording layer using the light.