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. 22, 2020
Filed:
Oct. 30, 2017
Applicant:
Sony Corporation, Tokyo, JP;
Inventor:
Katsunori Maeshima, Minato-ku, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/64 (2006.01); G11B 5/706 (2006.01); G11B 5/714 (2006.01); C01G 49/00 (2006.01); G11B 5/84 (2006.01);
U.S. Cl.
CPC ...
G11B 5/64 (2013.01); C01G 49/0009 (2013.01); C01G 49/0036 (2013.01); G11B 5/70678 (2013.01); G11B 5/714 (2013.01); G11B 5/84 (2013.01);
Abstract
A magnetic recording medium includes: a substrate; and a magnetic layer including a ferrimagnetic particle powder. A product (V×SFD) of a particle volume V and a holding force distribution SFD of the ferrimagnetic particle is equal to or less than 2500 nm.