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. 04, 2007
Filed:
Jul. 26, 2002
Hideki Kitaura, Souraku-gun, JP;
Noboru Yamada, Hirakata, JP;
Hideki Kitaura, Souraku-gun, JP;
Noboru Yamada, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical information recording mediumincludes a first substrate, a second substratedisposed in parallel with the first substrate, and an information layerdisposed between the first substrateand the second substrate, and the information layerincludes a recording layerand inorganic layers (lower side interface layerand upper side interface layer) adjacent to the recording layer. The recording layeris changed between at least two different states, which are discernable optically, by irradiation with a laser beamincident from the first substrateside. The inorganic layer contains a nitride of SiGe(where 0.3≦x≦0.9) as a main component. The present invention provides an optical information recording medium capable of recording/reproducing information with satisfactory reliability even in recording/reproducing with a light beam having a short wavelength or in recording/reproducing with respect to a plurality of information layers.