Patent ID: 7517598

Claim:
A magnetic recording medium comprising a non-magnetic support, a non-magnetic layer and a magnetic layer having a thickness of 1 nm to 200 nm, wherein the non-magnetic layer comprises a binder and a thermally curable crosslinking agent, wherein the magnetic layer forms outermost layer of the magnetic recording medium and comprises a ferromagnetic powder and a binder, and wherein at least 95% of the non-magnetic inorganic powder particles including primary and secondary particles, which are contained in the magnetic layer, have an acicular ratio of 1.5 or less and a particle size of 0.05 to 0.13 μm, provided that the non-magnetic inorganic powder particles are those found in a field of view of 1.8 μm×2.4 μm when the surface of the magnetic layer is observed with a scanning electron microscope at a magnification of 50,000 times.