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. 05, 2014
Filed:
Jun. 22, 2011
Applicants:
Naoyuki Fukumoto, Hyogo, JP;
Hiroshi Hatano, Osaka, JP;
Inventors:
Naoyuki Fukumoto, Hyogo, JP;
Hiroshi Hatano, Osaka, JP;
Assignee:
Hoya Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/82 (2006.01); G11B 5/187 (2006.01); G11B 5/127 (2006.01);
U.S. Cl.
CPC ...
G11B 5/82 (2013.01); G11B 223/0064 (2013.01); G11B 5/187 (2013.01); G11B 5/127 (2013.01);
Abstract
A magnetic recording medium includes, in a main surface of a glass substrate on which a magnetic recording layer is formed, a plurality of annular first thermally-conductive regions having a larger thermal conductivity than the glass substrate that are provided concentrically with the glass substrate. The first thermally-conductive regions are each provided so that it extends across a plurality of tracks. The first thermally-conductive region has a radial width larger than a depth, from the main surface, of the first thermally-conductive region.