Magnetic recording medium having controlled protrusion characteristics
AssigneeSony Corporation
InventorsToshiaki Miura, Satoru Abe, Yuuko Kamoshita, Riku Yoshida
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Abstract
A magnetic recording medium includes: a substrate that is long in shape; and a magnetic layer containing magnetic powder and a binder. The glass transition point of the binder is not lower than 75° C. In a case where atomic force microscope observation images in a 10 μm×10 μm rectangular shape are acquired at five locations randomly selected from the surface on the side of the magnetic layer, any linear protrusion that is 3 nm to 20 nm in height, is 0.3 μm to 1.0 μm in width, and extends across two sides of the observation image does not exist in the observation images of four locations among the acquired observation images of the five locations.
Claims15
A magnetic recording medium comprising:
- a substrate that is long in shape;
- and
- a magnetic layer including a magnetic powder and a binder, wherein
- a glass transition point of the binder is not lower than 75° C., and
- in a case where atomic force microscope observation images in a 10 μm×10 μm square shape are acquired at five locations randomly selected from a surface on a side of the magnetic layer, any linear protrusion that is 3 nm to 20 nm in height, is 0.3 μm to 1.0 μm in width, and extends across two sides of an observation image does not exist in the observation images of four locations among the observation images of the five locations that are acquired.
Dependencies are inferred from the claim text.