Magnetic recording medium
AssigneeKabushiki Kaisha Toshiba
InventorsTakashi Yamada, Naohiro Shoda
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Abstract
A magnetic recording medium comprises a support and a magnetic layer formed on the support and containing a magnetic powder and a binder resin, wherein an average value of surface roughness values Ra* measured in a very small area of 1 .mu.m.times.1 .mu.m on the support is 0.05 .mu.m or more and is 20% or less of a thickness of the magnetic layer.
Claims13
A magnetic recording medium comprising a support and a magnetic layer formed on the support and containing a magnetic powder and a binder resin, wherein said support has surface roughness values Ra*, measured by a method of needle contact, in the range of 0.004 to 0,015 .mu.m, and a mean center line average value Ra* of surface roughness values measured by a scanning tunneling microscope in a very small area of 1 .mu.m.times.1 .mu.m on said support is not less than 0.07 .mu.m and is not more than 20% of a thickness of said magnetic layer.
A magnetic recording medium comprising a support and a magnetic layer formed on the support and containing a magnetic powder and a binder resin, wherein said support has surface roughness values Ra, measured by a method of needle contact, in the range of 0,004 to 0.015 .mu.m, and a mean center line average value Ra* of surface roughness values measured by a scanning tunneling microscope in a very small area of 1 .mu.m.times.1 m on said support is more than 0.05 .mu.m and is not more than 20% of a thickness of said magnetic layer.
Dependencies are inferred from the claim text.