Recording and reproducing methods using an optical recording medium

摘要

An optical recording medium capable of recording and erasing information, includes a first dielectric layer, a recording layer, a second dielectric layer, a light reflection and heat dissipation layer, and an overcoat layer which are successively overlaid on a substrate, the recording layer including a phase-change recording material which includes as constituent elements Ag, In, Sb, Te, and N and/or O with the respective atomic % thereof being alpha , beta , gamma , delta and epsilon (the total atomic % of N and/or O), which are in the relationship of: 0 < alpha≤6, 3≤beta≤15, 50≤gamma≤65, 20≤delta≤35, 0≤epsilon≤5, provided that alpha + beta + gamma + delta + epsilon = 100, and (2) having a recrystallization upper-limit linear speed in a range of 2.5 to 5.0 m/s.