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:
Jun. 30, 2020
Filed:
Dec. 08, 2017
Applicant:
Showa Denko K.k., Tokyo, JP;
Inventors:
Koji Yukimatsu, Tochigi, JP;
Wataru Sato, Tochigi, JP;
Assignee:
SHOWA DENKO K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/73 (2006.01); G11B 5/84 (2006.01); G11B 5/858 (2006.01);
U.S. Cl.
CPC ...
G11B 5/7315 (2013.01); G11B 5/8404 (2013.01); G11B 5/858 (2013.01);
Abstract
A base for a magnetic recording medium, includes a substrate made of an Al alloy and having a surface, and a film made of a NiWP-based alloy and plated on the surface of the substrate. The film includes W in a range of 15 mass % to 22 mass %, P in a range of 3 mass % to 10 mass %, and Pb in a range of 0.03 mass % to 0.08 mass %. The film has a thickness of 5 μm or greater.