Patent ID: 7408860
Filing Date: 2008-08-05
Classification: G11B

Abstract:
1. An information recording method for recording information in an optical recording medium having at least first and second information recording layers, the method comprising: projecting a pulse-like laser beam whose power is modulated between a plurality of levels, including at least a recording power, onto the optical recording medium via a light incidence plane; forming on the optical recording medium a plurality of recording marks selected from a group that includes several types of recording marks with different lengths; setting recording powers of a top pulse and/or a last pulse of the laser beam used when at least one recording mark is to be formed in the first information recording layer to be lower than a recording power of a multi-pulse thereof, thereby recording information in the first information recording layer, wherein the first information recording layer is located on a side of the light incidence plane with respect to the second information recording layer and the second information recording layer is irradiated with the laser beam via the first information recording layer; and recording information in the second information recording layer with the recording powers of the top pulse and/or the last pulse of the laser beam set to be substantially same as the recording power of the multi-pulse thereof.