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. 21, 2008
Filed:
Feb. 24, 2005
Takahiro Suwa, Tokyo, JP;
Mitsuru Takai, Tokyo, JP;
Kazuhiro Hattori, Tokyo, JP;
Shuichi Okawa, Tokyo, JP;
Mikiharu Hibi, Tokyo, JP;
Takahiro Suwa, Tokyo, JP;
Mitsuru Takai, Tokyo, JP;
Kazuhiro Hattori, Tokyo, JP;
Shuichi Okawa, Tokyo, JP;
Mikiharu Hibi, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic recording medium includes at least a disk substrate, a magnetic recording layer formed with a predetermined concavo-convex pattern on the disk substrate, and a non-magnetic layer formed in concave portions of the concavo-convex pattern. Convex shapes made of a non-magnetic material are formed on the magnetic recording layer or the non-magnetic layer. Each convex shape is formed, for example, into a mountain-like shape whose upper surface width is made smaller than a width of each convex portion of the magnetic recording layer or a width of each concave portion where the non-magnetic layeris formed.