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:
Jul. 10, 2018
Filed:
Dec. 02, 2014
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Shinji Uchida, Matsumoto, JP;
Takehito Shimatsu, Sendai, JP;
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Abstract
A magnetic recording medium including a magnetic recording layer of a granular structure and having a large thickness as well as excellent magnetic properties is provided. The perpendicular magnetic recording medium includes a non-magnetic substrate and a magnetic recording layer, wherein the magnetic recording layer includes first magnetic recording layers on the side of the non-magnetic substrate and second magnetic recording layers, the first magnetic layers have a granular structure including first magnetic crystal grains containing an ordered alloy and a first non-magnetic segregant surrounding the first magnetic crystal grains and containing carbon; and the second magnetic layers have a granular structure including second magnetic crystal grains containing an ordered alloy and a second non-magnetic segregant surrounding the second magnetic crystal grains and containing Zn and O.