Patent ID: 6548137
Filing Date: 2003-04-15
Classification: G11B,Y10T

Abstract:
A method for optically recording information, using an optical recording medium comprising a phase-change recording layer comprising Sb and Te as essential elements therefor, to which is added at least one element selected from the group consisting of Ag, Au, Cu, Zn, B, Al, Ga, In, Si, Ge, Sn, Pb, N, P, Bi, La, Ce, Gd, and Tb, said recording layer being capable of assuming an amorphous phase changed from a crystalline phase by the application of a laser beam thereto, thereby optically recording information by forming recording marks therein, wherein when said recording marks are formed in said optical recording medium, a light emission wave of said laser beam is converted into a recording pulse train comprising a plurality of on-pulses and each off-pulse subsequent to said on-pulses, with a recording frequency &ngr; (&ngr;=1/Tw where Tw is a window width) being continuously changed corresponding to the location of each of said recording marks in the radial direction of said recording medium, either in the direction from an inner circumference towards an outer circumference of said recording medium, or in the direction from the outer circumference towards the inner circumference of said recording medium.