Patent ID: 6884487
Filing Date: 2005-04-26
Classification: G11B,Y10T

Abstract:
1. An optical recording medium comprising a recording layer which comprises a phase-change recording material which is capable of performing a reversible phase change from a crystalline phase to an amorphous phase and vice versa by light irradiation of said phase-change recording material, said recording layer being capable of writing information therein, reading written information therefrom, and rewriting written information by utilizing said reversible phase change of said phase-change recording material, wherein when a recording mark formed in said recording layer is repeatedly read 5000 times, using a continuous wave laser beam having such an intensity Pr that satisfies the condition of 1.1≦R≦2.0, in which R is the ratio of a 5000th repeated reading jitter σ said optical recording medium satisfies a relationship of d