Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Eiki Ozawa0
Norihito Kasada0
Date of Patent
August 28, 2018
Patent Application Number
15900412
Date Filed
February 20, 2018
Patent Citations Received
...
Patent Primary Examiner
Patent abstract
The magnetic tape device includes a magnetic tape; and a servo head, in which the servo head is a TMR head, the magnetic tape includes a servo pattern in the magnetic layer, a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is equal to or smaller than 0.050, and a ratio (Sdc/Sac) of an average area Sdc of a magnetic cluster of the magnetic tape in a DC demagnetization state and an average area Sac of a magnetic cluster thereof in an AC demagnetization state measured with a magnetic force microscope is 0.80 to 1.30.
Timeline
No Timeline data yet.
Further Resources
No Further Resources data yet.