| 摘要 |
PURPOSE:To obtain an optical recording medium which improves a deletion ratio in the overwright mode in particular as a phase variation optical recording medium and demonstrates high recording sensitivity. CONSTITUTION:A recording layer on a substrate contains at least, Ag, Sb and Te, and forms an amorphous phase uniformly during recording process, and becomes crystallized, splitting into an AgSbTe2 phase and an X phase when deleted. This X phase can be crystallized or amorphous. The recommended X phase is such as having a light absorption factor of 10<2>cm<-1> or higher and is allowed to contain a trace of other impurities such as oxygen (one atomic % or below). |
