Patent ID: 6921592

Claim:
A magnetic recording medium comprising a non-magnetic support, at least one primer layer formed on one surface of the non-magnetic support, a magnetic layer formed on the primer layer, and a backcoat layer formed on the other surface of the non-magnetic support, wherein the primer layer has a thickness of 0.3 to 3.0 μm, the magnetic layer has a thickness of 0.30 μm or less and a centerline average surface roughness Ra of 3.2 nm or less, and a ratio of μ mSL to μ mSUS [(μ mSL )/(μ mSUS )] is from 0.7 to 1.3 and a ratio of μ mSL to μ BSUS [(μ mSL )/(μ BSUS )] is from 0.8 to 1.5, wherein μ mSL is a coefficient of friction between said magnetic layer and a slider material, μ mSUS is a coefficient of friction between said magnetic layer and stainless steel (SUS 304), and μ BSUS is a coefficient of friction between the backcoat layer and stainless steel (SUS 304).