Patent ID: 6606292
Filing Date: 2003-08-12
Classification: G11B

Abstract:
A recording method for a phase-change recording medium having a phase-change recording layer in which amorphous marks each having a time length nT (T is the data reference clock period, and n is a natural number equal to or larger than 4) are formed by alternately irradiating the recording medium at least with a high-power energy beam having a relatively high power value and a low-power energy beam having a relatively low power value, said method comprising the steps of:(a-1) irradiating the low-power energy beam to the recording medium for a first set time yT (y is a natural number larger than 0) as a preceding low-power pulse irradiation step immediately before a prospective leading pulse that is a time section where the high-power beam is irradiated for the first time, and (a-2) irradiating the low-power energy beam to the recording medium for a second set time xT (x is a natural number larger than 0) as a succeeding low-power pulse irradiation step immediately after said prospective leading pulse, x and y having a relation expressed by the following formula (A) 0.95&lE;x+0.7*y&lE;2.5â€ƒâ€ƒ(A) where * is an arithmetic symbol representing a multiplication.