Invention Grant
- Patent Title: Magnetic recording medium and magnetic recording and reproducing device
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Application No.: US16367918Application Date: 2019-03-28
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Publication No.: US10741208B2Publication Date: 2020-08-11
- Inventor: Takuto Kurokawa , Eiki Ozawa
- 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$PriorityClaim@253aee48 com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@3fad55ec
- Main IPC: G11B5/127
- IPC: G11B5/127 ; G11B5/706 ; G11B5/78

Abstract:
The magnetic recording medium includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which a center line average surface roughness Ra measured regarding a surface of the magnetic layer is 1.0 nm to 1.6 nm, and a difference (Safter−Sbefore) between a spacing Safter measured by optical interferometry regarding the surface of the magnetic layer after ethanol cleaning and a spacing Sbefore measured by optical interferometry regarding the surface of the magnetic layer before ethanol cleaning is greater than 0 nm and equal to or smaller than 6.0 nm.
Public/Granted literature
- US20190304497A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE Public/Granted day:2019-10-03
Information query
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