Optical recording medium, recording material, method of producing optical recording medium and optical recording, reading and rewriting method

摘要

An optical recording medium including a recording layer which includes a reversible phase-change recording material, the recording layer being capable of writing information therein, reading written information therefrom, and rewriting written information by utilizing the reversible phase change of the phase-change recording material, wherein when a recording mark formed in the 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 sigma_repeat/sigma₁ as defined in the specification, the optical recording medium satisfies a relationship of d₁>d_ow as defined in the specification. The phase-change recording material, a method of producing the optical recording medium, and a method of writing information in the optical recording medium, reading written information therefrom and rewriting written information therein are proposed.