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. 18, 2005
Filed:
Apr. 03, 2003
Applicants:
Akira Sakawaki, Chiba, JP;
Masato Kokubu, Chiba, JP;
Ryuji Sakaguchi, Chiba, JP;
Hiroshi Sakai, Chiba, JP;
Inventors:
Akira Sakawaki, Chiba, JP;
Masato Kokubu, Chiba, JP;
Ryuji Sakaguchi, Chiba, JP;
Hiroshi Sakai, Chiba, JP;
Assignee:
Showa Denko Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5738 ;
U.S. Cl.
CPC ...
Abstract
An object of the present invention is to provide a process for easily producing a magnetic recording medium exhibiting excellent magnetic characteristics. In the present invention, an orientation-determining film is formed on a non-metallic substrate which has undergone texturing, the orientation-determining film is subjected to oxidation or nitridation, and a non-magnetic undercoat film and a magnetic film are formed on the film.