Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsTakako Ozawa, Hiroaki Doushita, Takeshi Harasawa
Life of this patent
Estimating the term…
Abstract
Provided is a magnetic recording medium with improved running properties and durability employing hexagonal ferrite. The magnetic recording medium comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a hexagonal ferrite powder and a binder in this order on a support. Said magnetic layer has a surface lubricant index ranging from 1.3 to 5.0 and a center surface average roughness SRa of a 40×40 μm area as measured by atomic force microscope (AFM) being equal to or less than 4 nm.
Claims16
A magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a hexagonal ferrite powder and a binder in this order on a support, wherein
- said magnetic layer has a surface lubricant index ranging from 1.3 to 5.0 and a center surface average roughness SRa of a 40×40 μm area as measured by atomic force microscope (AFM) being equal to or less than 4 nm.
Dependencies are inferred from the claim text.