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. 05, 2020
Filed:
Jun. 21, 2019
Showa Denko K.k., Tokyo, JP;
Tohoku University, Miyagi, JP;
Shin Saito, Miyagi, JP;
Takayuki Fukushima, Chiba, JP;
Lei Zhang, Chiba, JP;
Hisato Shibata, Chiba, JP;
Takehiro Yamaguchi, Chiba, JP;
Chen Xu, Chiba, JP;
Tetsuya Kanbe, Chiba, JP;
Tomoo Shige, Chiba, JP;
Kazuya Niwa, Chiba, JP;
Atsushi Hashimoto, Chiba, JP;
SHOWA DENKO K.K., Tokyo, JP;
TOHOKU UNIVERSITY, Miyagi, JP;
Abstract
A heat-assisted magnetic recording medium includes: a substrate; an underlayer; and a magnetic layer including an alloy having an L1structure. The substrate, the underlayer, and the magnetic layer are stacked in the recited order. The underlayer includes a first underlayer. The first underlayer includes magnesium oxide and one or more compounds selected from the group consisting of vanadium oxide, zinc oxide, tin oxide, vanadium nitride, and vanadium carbide, and a total content of the one or more compounds is in a range of 45 mol % to 70 mol %.