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:
Jan. 12, 2010
Filed:
Oct. 09, 2003
Haruhiko Habuta, Osaka, JP;
Ken'ichi Nagata, Nishinomiya, JP;
Yoshitaka Sakaue, Hirakata, JP;
Hideo Kusada, Osaka, JP;
Haruhiko Habuta, Osaka, JP;
Ken'ichi Nagata, Nishinomiya, JP;
Yoshitaka Sakaue, Hirakata, JP;
Hideo Kusada, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The optical information recording medium of the present invention includes a plurality of information layers provided on a substrate and an optical separating layer provided between information layer adjacent to each other, and information is recorded or reproduced by irradiation of a laser beam. When an information layer that is provided closest to a laser beam incident side of the plurality of information layers is taken as a first information layer and an optical separating layer provided in contact with the first information layer is taken as a first optical separating layer, then the first information layer comprises a recording layer, a transmittance adjusting layer that adjusts a transmittance of the first information layer, and a low refractive index layer provided between the transmittance adjusting layer and the first optical separating layer.