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:
Jul. 22, 2025
Filed:
Feb. 08, 2022
Sony Group Corporation, Tokyo, JP;
Minoru Yamaga, Tokyo, JP;
Futoshi Sasaki, Tokyo, JP;
Sony Group Corporation, Tokyo, JP;
Abstract
A magnetic recording medium is provided and including a magnetic layer containing magnetic powders, in which, the magnetic layer contains first particles having conductivity and second particles of which Mohs hardness is 7 or more, protrusions are formed on a surface of the magnetic layer side in accordance with the first particles and the second particles, a ratio (H/H) of an average height (H) of protrusions formed in accordance with the first particles to an average height (H) of protrusions formed in accordance with the second particles is 2.3 or less, and the average height (H) of the protrusions formed in accordance with the second particles is 7 nm or less.