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:
Nov. 17, 1998
Filed:
Nov. 06, 1996
Applicant:
Inventors:
Souta Matsuo, Nagano, JP;
Hiroshi Minazawa, Nagano, JP;
Masaki Miyazato, Nagano, JP;
Yoshiharu Kashiwakura, Nagano, JP;
Assignee:
Fuji Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428212 ; 428408 ; 4286 / ; 428900 ; 427130 ; 427131 ; 427523 ; 427577 ; 20419215 ;
Abstract
A magnetic recording medium is provided that includes a non-magnetic base, a magnetic layer laminated on a non-magnetic base, a carbon protective layer containing hydrogen and laminated on the magnetic layer, and a lubrication layer formed by applying a liquid lubricant to the carbon protective layer. The carbon protective layer includes a surface layer containing nitrogen, and the composition ratios of nitrogen and hydrogen in the surface layer may be suitably controlled to optimum ranges.