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:
Jan. 27, 2009
Filed:
Apr. 27, 2005
Mitsuru Takai, Chuo-ku, JP;
Yoshikazu Soeno, Chuo-ku, JP;
Katsumichi Tagami, Chuo-ku, JP;
Kazuya Shimakawa, Chuo-ku, JP;
Mitsuru Takai, Chuo-ku, JP;
Yoshikazu Soeno, Chuo-ku, JP;
Katsumichi Tagami, Chuo-ku, JP;
Kazuya Shimakawa, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic recording medium having high reliability is provided, in which concave portions between recording elements formed as convex portions of a concavo-convex pattern are approximately completely filled with a non-magnetic material. The magnetic recording medium is a plate-like body including: a substrate; a recording layer that is formed in a predetermined concavo-convex pattern over the substrate and includes recording elements for recording information formed as convex portions of the concavo-convex pattern; and the non-magnetic material filling concave portions between the recording elements. Side faces of the recording elements are inclined to face a surface of the plate-like body on a side toward which the recording elementsproject in the concavo-convex pattern. An inclination angle of the side faces of the recording elements with respect to a direction perpendicular to that surface is smaller than 90° and 5° or more.