Method of recording information to an optical recording medium, optical recording medium and information recorder/reproducer

Abstract

The present invention relates to a method of recording information to an optical recording medium which can reduce the influence of heat caused when adjacent recording marks are formed and which can prevent crosstalk and cross erasure of information. According to the present invention, when a recording mark is formed on an optical recording medium by irradiating a pulse-modulated laser beam thereon, since the recording power of one start pulse and one end pulse is set to Pw2 lower than any intermediate pulse The recording power Pw1, and the width Tcl of one cooling pulse is set to be equal to or wider than 1.0T, which is wider than the width of one pulse of the recording power, so it is possible to improve the cooling efficiency when recording marks are formed, thereby reducing the distance between recording marks Thermal interference, and achieve high-density recording and high data transfer rate.

Description

technical field [0001] The present invention relates to a method of recording information to an optical recording medium, an optical recording medium and an information recording and reproducing apparatus, and more particularly to a method of recording information to an optical recording medium, an optical recording medium, and an Information recording and reproducing apparatuses capable of improving cooling efficiency at the time of recording mark formation, thereby reducing thermal interference between recording marks, and preventing crosstalk and cross erasure of data. Background technique [0002] Optical recording media typified by CDs and DVDs have been widely used as recording media for recording digital data, and a widely used data recording format is one in which the length of recording marks along a track is determined according to the data to be recorded. modulation. For example, in a CD-RW (an optical recording medium whose data can be rewritten by the user), an...

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Problems solved by technology

[0011] However, although it is necessary to use a high linear recording rate in order to increase the data transfer rate to, for example, 70 Mbps and record data, in the case of increasing the recording power and erasing power of one laser beam to record data at a high rate However, due to the high crystallization rate of the phase change material film and the short interval between the laser beams being projected onto the phase change material film, recrystallization of the phase change material is likely to occur due to thermal interference

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