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. 27, 2013
Filed:
Feb. 22, 2011
Applicants:
Takashi Kikukawa, Tokyo, JP;
Atsuko Kosuda, Tokyo, JP;
Motohiro Inoue, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Inventors:
Takashi Kikukawa, Tokyo, JP;
Atsuko Kosuda, Tokyo, JP;
Motohiro Inoue, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a multilayer optical recording medium, it is an object to suppress generation of crosstalk while reducing an interlayer distance of recording and reading layers. In an optical recording medium including three or more recording and reading layers, a first distance, and a second distance greater than the first distance by 3 μm or more are alternately defined as interlayer distances of recording and reading layers.