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:
Mar. 27, 2012
Filed:
Dec. 03, 2009
Masahito Nakao, Osaka, JP;
Yasumori Hino, Nara, JP;
Yoshiaki Komma, Osaka, JP;
Fumitomo Yamasaki, Nara, JP;
Kousei Sano, Osaka, JP;
Masahito Nakao, Osaka, JP;
Yasumori Hino, Nara, JP;
Yoshiaki Komma, Osaka, JP;
Fumitomo Yamasaki, Nara, JP;
Kousei Sano, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An information recording medium according to the present invention includes at least three information recording layers. If the readout power of a laser beam in reading information from an information recording layer L(n) is identified by Pw(n), and if the readout power of the laser beam in reading information from an information recording layer L(n+a) is identified by Pw(n+a), then a base thickness between the information recording layers is determined so that the intensity of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n) becomes equal to or lower than that of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n+a).