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:
Jun. 02, 2009
Filed:
Jul. 15, 2005
Keiichiro Yusu, Yokohama, JP;
Sumio Ashida, Yokohama, JP;
Tsukasa Nakai, Hino, JP;
Shinichi Tatsuta, Tokyo, JP;
Hideki Ito, Kawasaki, JP;
Keiichiro Yusu, Yokohama, JP;
Sumio Ashida, Yokohama, JP;
Tsukasa Nakai, Hino, JP;
Shinichi Tatsuta, Tokyo, JP;
Hideki Ito, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An optical recording media has a disc substrate and two or more recording layers arranged apart from each other with a dielectric layer interposed therebetween to cause optical change simultaneously by irradiation with light, in which a first recording layer positioned near the disc substrate has a higher optical change temperature and a higher extinction coefficient compared with those of a second recording layer and a later recording layer.