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:
May. 07, 2019
Filed:
May. 15, 2018
Showa Denko K.k., Tokyo, JP;
Tohoku University, Miyagi, JP;
Shintaro Hinata, Miyagi, JP;
Shin Saito, Miyagi, JP;
Takayuki Fukushima, Chiba, JP;
Haruhisa Ohashi, Chiba, JP;
Kazuya Niwa, Chiba, JP;
Lei Zhang, Chiba, JP;
Yuji Murakami, Chiba, JP;
Hisato Shibata, Chiba, JP;
Takehiro Yamaguchi, Chiba, JP;
Tetsuya Kanbe, Chiba, JP;
Tomoo Shige, Chiba, JP;
SHOWA DENKO K.K., Tokyo, JP;
TOHOKU UNIVERSITY, Miyagi, JP;
Abstract
A magnetic recording medium includes a substrate, a barrier layer, a crystal grain size control layer, and a magnetic layer that are arranged in this order. The barrier layer includes at least one of oxides, nitrides, and carbides, and the crystal grain size control layer is a crystalline layer including Ag and having an average thickness in a range of 0.1 nm to 1 nm. The barrier layer makes contact with the crystal grain size control layer, and the magnetic layer includes an alloy having a L1crystal structure and a (001) face orientation.