Patent ID: 7525891

Claim:
A method for recording data in an optical recording medium wherein data are recorded in a write-once type optical recording medium including at least one recording layer disposed on a substrate by projecting a laser beam whose power is modulated in accordance with a pulse train pattern including at least pulses whose levels are set to levels corresponding to a recording power and a bottom power onto the at least one recording layer and forming a recording mark in a predetermined region of the at least one recording layer, the method for recording data in an optical recording medium comprising: employing a pulse train pattern having a smaller number of pulses whose level is set to a level corresponding to a recording power as a linear recording velocity becomes higher and modulating the power of the laser beam thereby to form a recording mark in the predetermined region of the at least one recording layer, wherein the number of pulses is set to one (1) in the case where data are to be recorded at a high linear recording velocity equal to or higher than a first linear recording velocity, wherein in the case where data are to be recorded at an intermediate linear recording velocity lower than the first linear recording velocity and higher than a second linear recording velocity, the number of pulses is set to one (1) at least when a shortest recording mark is to be formed and the number of pulses is set larger as a length of a recording mark to be formed becomes longer, and wherein in the case where data are to be recorded at a low linear recording velocity equal to or lower than the second linear recording velocity, the number of pulses is set such that a difference between the number of pulses and a number corresponding to a length of each recording mark is constant, and such that, for at least one length of a recording mark, the number of pulses set at the low linear recording velocity is greater than the number of pulses set at the intermediate linear recording velocity.