OPTICAL RECORDING MEDIUM AND RECORDING AND REPRODUCING METHOD USING THE SAME

摘要

PURPOSE:To obtain an optical recording medium having such recording and reproducing characteristics as satisfactory erasure ratio with a laser light source emitting light of <=600nm wavelength. CONSTITUTION:This optical recording medium has a 1st dielectric layer, a phase change type recording layer, a 2nd dielectric layer and a reflecting layer in order on the substrate. The thickness of the recording layer is 15-50nm, the 2nd dielectric layer is made of a material having >5.0X10<-4> pJ.mum<-1>.K<-1>.ns<-1> heat conductivity and the thickness of the 2nd dielectric layer is 10-250nm.