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:
Dec. 05, 1995
Filed:
Nov. 12, 1993
Applicant:
Inventors:
Kunihiro Ueda, Tokyo, JP;
Takayoshi Kobuke, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; G11B / ; B05D / ;
U.S. Cl.
CPC ...
428332 ; 428336 ; 428447 ; 428463 ; 4286 / ; 4286 / ; 4286 / ; 4286 / ; 4286 / ; 428702 ; 427127 ; 427128 ; 427130 ; 427131 ; 427132 ;
Abstract
A magnetic recording medium having a magnetic layer in the form of a ferromagnetic metal thin film includes an undercoat film disposed between the magnetic layer and the substrate and a topcoat film on the magnetic layer. Each of the undercoat and topcoat films is a plasma polymerized film containing silicon, the Si content in the film being 30 to 50 at %. Corrosion resistance and durability are significantly improved.