Patent ID: 6963527
Filing Date: 2005-11-08
Classification: G11B

Abstract:
1. An information recording method comprising: irradiating a phase-change recording layer of an optical recording medium with either a multi-pulse laser light train having a recording power of Pw or laser light having an erasing power Pe to allow the phase-change recording layer to reversibly achieve a crystal state and an amorphous state, thereby recording a mark having a mark length nT in the recording layer, wherein n is an integer of from 3 to 14 and T represents a clock cycle, wherein the multi-pulse laser light train has a constitution such that a heating pulse and a cooling pulse are alternated, wherein the number of heating pulses and the number of cooling pulses each increases by one when n increases by two, and wherein when n is from 6 to 14, a last heating pulse has a pulse width of from 0.5T to 0.9T and a last cooling pulse has a pulse width of from 0.7T to 1.5T.