Patent ID: 7260044

Claim:
A recording method for a phase-change optical recording medium, comprising the step of: irradiating an electromagnetic wave to a phase-change optical recording medium containing phase-change layer at least at a recording linear velocity according to a multipulse pattern so as to perform writing and rewriting by inducing a reversible phase change between a non-crystalline phase and a crystalline phase and utilizing a variation in optical constant cased by the reversible phase change, wherein the multipulse pattern contains pulses of a peak power (Pp), an erasing power (Pe) and a bias power (Pb), wherein a starting time of a front pulse when forming a mark, that is a front pulse of the peak power, starts 0.5T to 1.25T later than a starting point of the first reference clock relative to the mark at least at a recording linear velocity, where T is a reference clock of the multipulse pattern, wherein an ending time of a rear pulse, that is one of a rear pulse of the peak power and a rear pulse of the bias power, ends T-OPm earlier than an ending point of the last reference clock relative to the mark with at least one recording linear velocity, where OPm is a irradiating time of the peak power relative to the rear pulse thereof.