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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.:

US 11189313 B1

PDFFull Text
Date of Patent:
Nov. 30, 2021

Filed:

Jan. 05, 2021

Magnetic recording medium utilizing adjacent underlayer and magnetic layer having particular compositions, magnetic storage apparatus, and method of manufacturing magnetic recording medium

Applicant:

Showa Denko K.k., Tokyo, JP;

Inventors:

Koichi Nagasaka, Chiba, JP;

Takayuki Fukushima, Chiba, JP;

Lei Zhang, Chiba, JP;

Chen Xu, Chiba, JP;

Hisato Shibata, Chiba, JP;

Takehiro Yamaguchi, Chiba, JP;

Hiroshi Koyanagi, Chiba, JP;

Yuji Umemoto, Chiba, JP;

Assignee:

SHOWA DENKO K.K., Tokyo, JP;

Attorney:

IPUSA, PLLC

Primary Examiner:

Jefferson A Evans

Int. Cl.
CPC ...
G11B 5/70 (2006.01); G11B 5/706 (2006.01); G11B 5/73 (2006.01); G11B 5/33 (2006.01); G11B 5/851 (2006.01); G11B 5/716 (2006.01); G11B 5/66 (2006.01);
U.S. Cl.
CPC ...
G11B 5/73919 (2019.05); G11B 5/33 (2013.01); G11B 5/672 (2021.05); G11B 5/70615 (2013.01); G11B 5/70621 (2013.01); G11B 5/716 (2013.01); G11B 5/7361 (2019.05); G11B 5/851 (2013.01);
Abstract

A magnetic recording medium includes a substrate, an underlayer provided above the substrate, and a magnetic layer provided on and in contact with the underlayer. The underlayer includes a compound represented by a general formula MgO, where x falls within a range of 0.07 to 0.25. The magnetic layer includes an alloy having a L1structure, and the alloy having the L1structure includes one or more elements selected from a group consisting of Al, Si, Ga, and Ge.

Find Patent Forward Citations

Nagasaka, Koichi. (2021). Magnetic recording medium utilizing adjacent underlayer and magnetic layer having particular compositions, magnetic storage apparatus, and method of manufacturing magnetic recording medium (U.S. Patent No. 11189313). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11189313

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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