Patent ID: 8064308
Filing Date: 2011-11-22
Classification: G11B

Abstract:
1. A method for producing a recording pulse that includes a combination of a leading pulse corresponding to a first recording power and a subsequent intermediate pulse corresponding to a second recording power, and for recording data onto an optical disk having a plurality of recording layers, the data being recorded onto the optical disk based on the recording pulse, the method comprising: setting the first recording power at a sufficiently higher level than a lower limit of power required to form marks on the plurality of recording layers of the optical disk; setting the second recording power at a level lower than the first recording power, the second recording power being equal to or greater than the lower limit of the power required to continuously form the marks on the plurality of recording layers of the optical disk, such that the marks are continuously formed on the plurality of recording layers of the optical disk while the second recording power is applied; determining a ratio of the second recording power to the first recording power for each of the plurality of recording layers, such that the ratio for a farthest recording layer away from a head of an optical disk recording device differs from the ratio for any other recording layer of the plurality of recording layers, when recording the data onto the optical disk; and recording the data onto the optical disk according to the determined ratio of the second recording power to the first recording power for each of the plurality of recording layers.