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:
Aug. 21, 2012
Filed:
May. 15, 2009
Applicants:
Haruhiko Habuta, Osaka, JP;
Noboru Yamada, Osaka, JP;
Shigeru Furumiya, Hyogo, JP;
Inventors:
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 3/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An information recording medium () comprises an information layer () in which concavo-convex marks are formed, and a recording layer (), contained within the information layer (), in which added marks are formed by optical properties changing through laser irradiation, and that contains Te, O, and M (where M is at least one element selected from a group consisting of Pd, Au, Pt, Ag, Cu, and Ni). In this information recording medium (), a pre-laser irradiation reflectance Ra and a post laser irradiation reflectance Rb fulfill 1.0<Rb/Ra<1.1.