Patent ID: 7300714

Claim:
A magnetic recording medium comprising, in order; a non-magnetic substrate; a non-magnetic layer containing a non-magnetic powder and a binder resin; and a magnetic layer containing a ferromagnetic powder having an average major axis length of 80 nm or less and a binder resin, wherein the non-magnetic powder contains a non-magnetic inorganic powder having an average particle diameter of 80 nm or less; wherein the three-dimensional center surface average roughness of the magnetic layer surface is 3.0 nm or less in a region of 100 μm 2 based on a measurement with an atomic force microscope; and wherein the area share held by asperities of at least ±5.0 nm with reference to the surface at an average height is 15 percent or less in a region of 100 μm 2 on the magnetic layer surface based on a measurement with an atomic force microscope.