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:
May. 15, 2012
Filed:
Feb. 04, 2009
Applicants:
Hisako Takei, Nishitokyo, JP;
Chiseki Haginoya, Tokyo, JP;
Hiroshi Suzuki, Koganei, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a magnetic recording medium, there are realized an improvement in surface planarity and a reduction in characteristic degradation. The magnetic recording medium is fabricated so that the upper layer of a recording layer and a refill layer are formed of the same material.