Sony Corporation

Norio Mitsui

Jun Nakano

Sakuya Tamada

Kouichi Yasuda

Mitsuaki Oyamada

An optical recording medium using Sn as the recording material to improve the jitter is provided, in which on the surface of a disc substratewhere a concave and convex shape dividing a track area is formed, are formed on the surface of the concave and convex shape a first protective layerfor protecting at least an optical recording layer, an optical recording layerusing a chemical compound at least composed of tin (Sn), nitrogen (N) and oxygen (O), formed on the first protective layer, a second protective layerfor protecting this optical recording layer, formed on this optical recording layer, and a light-transmittable layerformed on the second protective layer; with this structure, the optical recording layerunder high temperature and high humidity can be stabilized by means of the first and second protective layersand

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Kanagawa, Japan

Norio Mitsui