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:
May. 06, 1986
Filed:
Jul. 26, 1982
Applicant:
Inventors:
Shigeo Shimizu, Yokohama, JP;
Toshio Kato, Yamato, JP;
Hitoshi Oda, Yokohama, JP;
Masanobu Shigeta, Isehara, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
428615 ; 428336 ; 428621 ; 428624 ; 428626 ; 428678 ; 428900 ; 428928 ;
Abstract
A magnetic recording medium comprising a support, a first layer formed on the support by evaporating cobalt or its alloy by an oblique-incidence vacuum evaporation technique, and a second plated layer made of cobalt or its alloy and formed by a wet plating. The cobalt alloy for the first layer substantially consists of, aside from cobalt, up to 30 wt % of Ni, Fe, Cu, W, Cr, Ru or a mixture thereof. On the other hand, the cobalt alloy for the second layer substantially consists of up to 40 wt % of Ni, up to 8 wt % of P and the balance of Co.