Optical recording medium

摘要

An optical recording medium includes a recording layer including a reflective layer, two dielectric layers, and a phase-change recording layer. The phase-change recording layer-side dielectric layer of the two dielectric layers contains tantalum oxide or a composite oxide composed of silicon oxide, indium oxide, and zirconium oxide. The reflective layer-side dielectric layer of the two dielectric layers contains a composite oxide composed of silicon oxide, indium oxide, and zirconium oxide, a composite oxide composed of indium oxide and gallium oxide, or a composite oxide composed of zinc oxide and aluminum oxide.

主权项

1. An optical recording medium comprising:
a recording layer including a reflective layer, two dielectric layers, and a phase-change recording layer, wherein the phase-change recording layer-side dielectric layer of the two dielectric layers contains tantalum oxide or a composite oxide composed of silicon oxide, indium oxide, and zirconium oxide; and the reflective layer-side dielectric layer of the two dielectric layers contains a composite oxide composed of silicon oxide, indium oxide, and zirconium oxide, a composite oxide composed of indium oxide and gallium oxide, or a composite oxide composed of zinc oxide and aluminum oxide; wherein the phase-change recording layer contains bismuth, germanium, tellurium, and silver; and wherein a content of silver relative to a total amount of bismuth, germanium, tellurium, and silver is within a range of 2.0 atomic % or more and 3.5 atomic % or less.