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. 04, 1980
Filed:
Jun. 29, 1977
Applicant:
Inventors:
Akira Terada, Mito, JP;
Seizi Hattori, Tomobe, JP;
Yoshikazu Ishii, Mito, JP;
Akira Nohara, Mito, JP;
Nobuo Inagaki, Katsuta, JP;
Wakatake Matsuda, Zama, JP;
Susumu Kawakami, Tama, JP;
Assignees:
Nippon Telegraph and Telephone Public Corporation, Tokyo, JP;
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
428 64 ; 2041 / ; 427130 ; 428539 ; 428900 ;
Abstract
A method of roducing .gamma.-Fe.sub.2 O.sub.3 magnetic disk medium of continuous thin film is provided, in which a deposition source is deposited on an opposed Al-alloy substrate by means of a reactive vacuum deposition technique and the deposited film is thermally treated so as to be the magnetic disk medium. As the deposition source, a ferroalloy containing about 1 to 10 at.% Ti and about 0.5 to 5 at.% Co is employed.