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. 28, 2012
Filed:
Oct. 27, 2009
Applicants:
Masato Fukushima, Chiba, JP;
Shinichi Ishibashi, Tokyo, JP;
Akira Yamane, Ichihara, JP;
Inventors:
Assignee:
Showa Denko K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/127 (2006.01); H04R 31/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A magnetic recording medium which does not easily cause a material containing Fe or Co to corrode is disclosed. The method for manufacturing a magnetic recording mediumincludes a process of forming a magnetic layeron a non-magnetic substrate, a process of forming a recessed areain the magnetic layer, a process of forming a corrosion-resistant filmto cover an exposure surfaceof the recessed area, and a process of forming a magnetic recording pattern made of the magnetically separated magnetic layerby forming a non-magnetic layerto fill in the recessed area