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:
Oct. 30, 2012
Filed:
Mar. 08, 2010
Yoshinori Uchiyama, Tokyo, JP;
Takahiro Suwa, Tokyo, JP;
Narutoshi Fukuzawa, Tokyo, JP;
Kazuya Shimakawa, Tokyo, JP;
Yoshinori Uchiyama, Tokyo, JP;
Takahiro Suwa, Tokyo, JP;
Narutoshi Fukuzawa, Tokyo, JP;
Kazuya Shimakawa, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic recording medium is provided in which recording elements and concave portions have a clear difference in terms of magnetism at the boundaries therebetween, and which has favorable production efficiency. The magnetic recording medium includes a substrate; a recording layer formed in a predetermined concavo-convex pattern over the substrate, convex portions of the concavo-convex pattern serving as recording elements; and a filler portion filling a concave portion between the recording elements. A center part of a bottom surface of the concave portion protrudes from edge parts of the bottom surface of the concave portion in a direction away from the substrate.