Invention Grant
- Patent Title: Magnetic recording medium having characterized back coat and magnetic recording and reproducing apparatus
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Application No.: US17025092Application Date: 2020-09-18
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Publication No.: US11302357B2Publication Date: 2022-04-12
- Inventor: Naoki Sano , Takuto Kurokawa , Eiki Ozawa , Norihito Kasada , Megumi Nakano
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JPJP2019-170508 20190919
- Main IPC: G11B5/78
- IPC: G11B5/78 ; G11B5/733 ; G11B5/735 ; G11B5/706

Abstract:
The magnetic recording medium includes: a non-magnetic support; a magnetic layer that includes ferromagnetic powder on one surface side of the non-magnetic support; and a back coating layer that includes non-magnetic powder on the other surface side of the non-magnetic support, in which a difference between a spacing measured on a surface of the back coating layer by optical interferometry under a pressure of 0.5 atm after n-hexane cleaning and a spacing measured on the surface of the back coating layer by optical interferometry under a pressure of 13.5 atm after n-hexane cleaning is 12 nm or more.
Public/Granted literature
- US20210090602A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS Public/Granted day:2021-03-25
Information query
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