Patent ID: 7477587

Claim:
An information-recording method for recording information on an information-recording medium, the information-recording method comprising: moving a light beam at a selected linear velocity relative to the information-recording medium; controlling the light beam to generate a multi-pulse having at least three power levels of a first power level Ph, a second power level Pl which is lower than the first power level, and a third power level Pm which is between the first and second power levels, the multi-pulse being repeatedly modulated between the first power level Ph and the third power level Pm, the second power level Pl being smaller than the third power level Pm, the second power level Pl being a crystallization level; adjusting the third power level Pm in response to the selected linear velocity; and recording the information by irradiating the information-recording medium with the controlled light beam including the adjusted third power level to change a state of an irradiated portion of the information-recording medium, wherein a ratio (Pm−Pl)/(Ph−Pl) of a difference between the third power level Pm and the second power level Pl with respect to a difference between the first power level Ph and the second power level Pl is adjusted in response to the linear velocity.