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:
Apr. 14, 2015
Filed:
Dec. 11, 2013
Applicants:
Motohiro Inoue, Tokyo, JP;
Tomoki Ushida, Tokyo, JP;
Atsuko Kosuda, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
Inventors:
Motohiro Inoue, Tokyo, JP;
Tomoki Ushida, Tokyo, JP;
Atsuko Kosuda, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/24 (2013.01); G11B 7/09 (2006.01); G11B 7/1267 (2012.01); G11B 7/24018 (2013.01); G11B 7/2403 (2013.01); G11B 7/24038 (2013.01); G11B 7/2405 (2013.01); G11B 7/24079 (2013.01); G11B 7/14 (2012.01);
U.S. Cl.
CPC ...
G11B 7/0903 (2013.01); G11B 7/09 (2013.01); G11B 7/1267 (2013.01); G11B 7/14 (2013.01); G11B 7/24018 (2013.01); G11B 7/2403 (2013.01); G11B 7/24038 (2013.01); G11B 7/2405 (2013.01); G11B 7/24079 (2013.01);
Abstract
An optical recording medium includes a recording and reading layer that is previously staked or formed afterword and has no concavo-convex pattern for tracking control, and a servo layer in which a concavo-convex pattern or a groove for tracking control is formed. Information can be recorded in the recording and reading layer while tracking is performed using the servo layer.