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:
Sep. 10, 2024
Filed:
Apr. 30, 2020
Showa Denko K.k., Tokyo, JP;
Chen Xu, Chiba, JP;
Lei Zhang, Chiba, JP;
Takayuki Fukushima, Chiba, JP;
Hisato Shibata, Chiba, JP;
Takehiro Yamaguchi, Chiba, JP;
Kazuya Niwa, Chiba, JP;
Tomoo Shige, Chiba, JP;
Hiroaki Nemoto, Chiba, JP;
Yuji Umemoto, Chiba, JP;
Hiroshi Koyanagi, Chiba, JP;
RESONAC CORPORATION, Tokyo, JP;
Abstract
A magnetic recording medium includes a substrate, an underlayer formed on the substrate, and a magnetic layer formed on the underlayer. The magnetic layer includes an alloy having a L1structure. The underlayer includes a first underlayer and a second underlayer. The first underlayer includes Mo and Ru, the content of Ru in the first underlayer is in a range of 5 atom % to 30 atom %, and the second underlayer includes a material having a body-centered cubic (BCC) structure. The second underlayer is formed between the first underlayer and the substrate.