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:
Nov. 04, 2025
Filed:
Feb. 08, 2024
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Ryo Osamura, Kawasaki Kanagawa, JP;
Yuji Nakagawa, Kawasaki Kanagawa, JP;
Tomoyuki Maeda, Kawasaki Kanagawa, JP;
Masayuki Takagishi, Kunitachi Tokyo, JP;
Naoyuki Narita, Funabashi Chiba, JP;
Kosuke Kurihara, Yokohama Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Abstract
According to one embodiment, a magnetic recording medium includes a first magnetic region, a second magnetic region, a third magnetic region, a fourth magnetic region, and a fifth magnetic region. The second magnetic region is provided between the fifth magnetic region and the first magnetic region in a first direction from the fifth magnetic region to the first magnetic region. The third magnetic region is provided between the fifth magnetic region and the second magnetic region in the first direction. The fourth magnetic region is provided between the fifth magnetic region and the third magnetic region in the first direction. A first composition ratio of a first Pt atomic concentration to a first Co atomic concentration in the first magnetic region is higher than a second composition ratio of a second Pt atomic concentration to a second Co atomic concentration in the second magnetic region.