Patent ID: 8034530

Claim:
An information recording method for recording information in a data rewritable type optical recording medium having a plurality of information recording layers by projecting a laser beam thereonto whose power is modulated between a plurality of powers including at least a recording power (Pw) and an erasing power (Pe), the erasing power (Pe) lower than the recording power (Pw) and in accordance with a pulse train pattern including a plurality of pulses, via a light incidence plane, the information recording method comprising: setting λ/NA to be equal to or smaller than 700 nm where λ is a wavelength of the laser beam and NA is a numerical aperture (NA) of an objective lens; and when recording information in the optical recording medium, setting a ratio (Pe/Pw) of the erasing power (Pe) to the recording power (Pw) when information is to be recorded in an information recording layer closest to the light incidence plane to be smaller than that when information is to be recorded in an information recording layer(s) other than the information recording layer closest to the light incidence plane.