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:
Feb. 28, 2012
Filed:
Mar. 05, 2008
Noboru Sasa, Kawasaki, JP;
Yoshitaka Hayashi, Yokohama, JP;
Toshishige Fujii, Yokohama, JP;
Toshihide Sasaki, Yokohama, JP;
Hiroyoshi Sekiguchi, Yokohama, JP;
Masayuki Fujiwara, Kawasaki, JP;
Noboru Sasa, Kawasaki, JP;
Yoshitaka Hayashi, Yokohama, JP;
Toshishige Fujii, Yokohama, JP;
Toshihide Sasaki, Yokohama, JP;
Hiroyoshi Sekiguchi, Yokohama, JP;
Masayuki Fujiwara, Kawasaki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
To provide an optical recording medium including a substrate and over the substrate at least a recording layer that can record and reproduce with laser light in a blue wavelength region, wherein the recording layer includes Bi and O as main components, further includes at least any of C and N, and does not include Fe; or an optical recording medium including a substrate and over the substrate at least a recording layer that contains, as main components, Bi oxide, and a simple substance of each of one or more elements M (except Bi, C, and N) that enhance a light absorption function for a recording and reproducing laser light, wherein the optical recording medium can record and reproduce with laser light in a blue wavelength region, is provided.