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. 15, 2005
Filed:
Oct. 17, 2002
Masahiko Sugiyama, Yokohama, JP;
Masaru Segawa, Yokohama, JP;
Masahiko Sugiyama, Yokohama, JP;
Masaru Segawa, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A thin film magnetic recording medium () is composed of an underlayer film (), which is constituted by a nonmagnetic metal oxide film and formed on a nonmagnetic substrate (), and a magnetic film () of Co system, which is formed on the underlayer film () through an oblique evaporation process, wherein each of the underlayer film and the magnetic film is laminated in order. Fine particles of the nonmagnetic metal oxide film grow isotropically in the underlayer film () constituted by the nonmagnetic metal oxide film and the underlayer film () is formed in a construction without having a clear grain boundary, which separates a aggregation of the fine particles.