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:
Mar. 24, 1987
Filed:
Apr. 10, 1986
Applicant:
Inventors:
Ryuji Shirahata, Kanagawa, JP;
Yoshihiro Arai, Kanagawa, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 39 ; 427132 ; 427251 ; 427296 ;
Abstract
A process for preparing a magnetic recording medium by forming a ferromagnetic thin film on a non-magnetic support moving along a rotating drum by a vapor deposition method is disclosed, comprising introducing a first oxidizing gas and then introducing a second oxidizing gas near the surface of the ferromagnetic film moving along the rotating drum and glow-discharging the second oxidizing gas, using a charging energy (G) for glow discharge per unit area of a ferromagnetic thin film surface of 1.0 W.multidot.sec/cm.sup.2 or more.