Magnetic tape having characterized magnetic layer surface, magnetic tape cartridge, and magnetic tape apparatus
AssigneeFUJIFILM Corporation
InventorsNorihito Kasada, Yuto Murata, Nagisa Yamasaki
Life of this patent
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Abstract
The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation σ of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.
Claims17
A magnetic tape comprising:
- a non-magnetic support;
- and
- a magnetic layer containing a ferromagnetic powder,
- wherein the non-magnetic support is polyethylene terephthalate, polyethylene naphthalate or polyamide,
- in a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less, and
- standard deviation σ of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.
Dependencies are inferred from the claim text.