Patent ID: 6660451
Filing Date: 2003-12-09
Classification: G11B,Y10S

Abstract:
An optical information recording medium comprising, on a transparent substrate having unevenness for tracking and wherein a signal is recorded on both land and groove, a phase-change type recording layer that reversibly changes between an amorphous phase and a crystalline phase and contains at least one selected from the group consisting of Te, Se, Sb, In, and Ge, wherein a thickness of the phase-hange type recording layer is between 5 nm and 15 nm, and a dielectric layer comprising at least one selected from the group consisting of Ge and Si, and N is formed so as to be in contact with the phase-change type recording layer, and wherein the phase-change type recording layer contains Cr in an amount of 0.5 to 10 atom % and the dielectric layer contains Cr in an amount of 5 to 40 atom %.