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:
Aug. 21, 2018
Filed:
Jan. 22, 2014
Showa Denko K.k., Minato-ku, Tokyo, JP;
SHOWA DENKO K.K., Minato-ku, Tokyo, JP;
Abstract
A method of manufacturing a magnetic recording medium, includes at least: forming an orientation control layerthat controls orientation of an immediately above layer thereof on a non-magnetic substrate; and forming a perpendicular magnetic layerin which an easy axis of magnetization is mainly perpendicularly orientated to the non-magnetic substrate, in which the forming of the orientation control layerincludes forming a granular layer having a granular structure that includes Ru or a material in which Ru is a main component and an oxide having a melting point which is greater than or equal to 450° C. and less than or equal to 1000° C., by a sputtering method, and the forming of the perpendicular magnetic layerincludes growing crystal grains to form columnar crystals that are continuous in a thickness direction together with crystal grains that form the orientation control layer