The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 2008
Filed:
Mar. 10, 2004
Kouichi Yasuda, Tokyo, JP;
Mitsuaki Oyamada, Kanagawa, JP;
Jun Nakano, Tokyo, JP;
Norio Mitsui, Kanagawa, JP;
Sakuya Tamada, Tokyo, JP;
Kouichi Yasuda, Tokyo, JP;
Mitsuaki Oyamada, Kanagawa, JP;
Jun Nakano, Tokyo, JP;
Norio Mitsui, Kanagawa, JP;
Sakuya Tamada, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
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