Patent ID: 6497935
Filing Date: 2002-12-24
Classification: G11B,Y10T

Abstract:
A phase-change optical information recording medium which comprises a substrate and a recording layer provided on said substrate, said recording layer comprising a phase-change recording material capable of recording information, reproducing recorded information, and erasing recorded information reversibly with reversible phase changes in said phase-change recording material, with successive formation of a recording mark with a low reflectivity and a length of at least one unit extending in an optical recording scanning direction, and a space with a high reflectivity and a length of at least one unit extending in said optical recording scanning direction, wherein information is recorded by a plurality of signals being recorded in said recording layer, each signal constituting a recording mark area including a recording initiation marking portion with (a) a length of at least two times a minimum length of said recording mark and (b) a width (W1) of at least 1.1 times an average width (W2) of the other portion of said recording mark area.