Invention Grant
- Patent Title: Magnetic recording medium
-
Application No.: US16070140Application Date: 2016-12-14
-
Publication No.: US11355145B2Publication Date: 2022-06-07
- Inventor: Eiji Nakashio , Masaru Terakawa , Yoichi Kanemaki , Tomoe Sato , Katsunori Maeshima , Nobuyuki Sasaki
- Applicant: Sony Corporation
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JPJP2016-008768 20160120
- International Application: PCT/JP2016/005121 WO 20161214
- International Announcement: WO2017/125981 WO 20170727
- Main IPC: G11B5/65
- IPC: G11B5/65 ; G11B5/706 ; G11B5/714

Abstract:
The magnetic recording medium includes a long substrate body, and a magnetic layer including a powder of cubic crystal ferrite magnetic particles. The sum of a squareness ratio in the longitudinal direction and a squareness ratio in the vertical direction is 1.2 or more, and the difference of the squareness ratio in the longitudinal direction and the squareness ratio in the vertical direction is 0.15 or more.
Public/Granted literature
- US20190013043A1 MAGNETIC RECORDING MEDIUM Public/Granted day:2019-01-10
Information query
IPC分类: