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:
Feb. 20, 1996
Filed:
Feb. 10, 1994
Applicant:
Inventor:
Fumiaki Yokoyama, Yokohama, JP;
Assignee:
Mitsubishi Chemical Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; G11B / ; C23C / ;
U.S. Cl.
CPC ...
428 653 ; 428 654 ; 428 655 ; 428 656 ; 428 657 ; 428336 ; 428611 ; 428627 ; 428663 ; 428667 ; 428670 ; 4286 / ; 4286 / ; 4286 / ; 4286 / ; 428900 ; 2041921 ; 20419714 ; 20419215 ; 2041922 ;
Abstract
A magnetic recording medium comprising a non-magnetic substrate and a magnetic alloy layer formed on the substrate with a non-magnetic primer layer containing chromium as the main component interposed therebetween, wherein the magnetic alloy layer contains cobalt and nickel as the main components and not more than 8 atomic % of boron and has been formed by sputtering under such a condition that a negative bias voltage is applied to the non-magnetic substrate.