Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Norihito Kasada0
Eiki Ozawa0
Date of Patent
December 3, 2019
0Patent Application Number
161843120
Date Filed
November 8, 2018
0Patent Citations
...
Patent Citations Received
Patent Primary Examiner
Patent abstract
The magnetic tape device includes a TMR head (servo head); and a magnetic tape, in which a magnetic layer of the magnetic tape includes fatty acid ester, Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, full widths at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before and after performing a vacuum heating with respect to the magnetic tape are greater than 0 nm and equal to or smaller than 7.0 nm, a difference between spacings before and after the vacuum heating is greater than 0 nm and equal to or smaller than 8.0 nm, and ΔSFD (=SFD25° C.−SFD−#° C.) in a longitudinal direction of the magnetic tape is equal to or smaller than 0.50.
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