Invention Grant
- Patent Title: Magnetic recording medium having characterized magnetic layer and method for manufacturing same
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Application No.: US15705531Application Date: 2017-09-15
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Publication No.: US10692522B2Publication Date: 2020-06-23
- Inventor: Toshio Tada , Norihito Kasada , Masahito Oyanagi , Akinori Sugishima , Kengo Saito
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@5cb7af51
- Main IPC: G11B5/706
- IPC: G11B5/706 ; G11B5/842 ; G11B5/70 ; G11B5/845 ; G11B5/708

Abstract:
The magnetic recording medium has a non-magnetic support and a magnetic layer which is provided on the support and contains ferromagnetic powder and a binder, in which the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, the magnetic layer contains an abrasive, an intensity ratio (Int (110)/Int (114)) of a peak intensity Int (110) of a diffraction peak of (110) plane of a crystal structure of the hexagonal ferrite, determined by performing X-ray diffraction analysis on the magnetic layer by using an In-Plane method, to a peak intensity Int (114) of a diffraction peak of (114) plane of the crystal structure is equal to or higher than 0.5 and equal to or lower than 4.0, and a squareness ratio in a vertical direction is equal to or higher than 0.65 and equal to or lower than 1.00. The present invention also provides a method for manufacturing the magnetic recording medium.
Public/Granted literature
- US20180082710A1 MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING SAME Public/Granted day:2018-03-22
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