Patent ID: 7282279

Claim:
A magnetic recording medium comprising: a non-magnetic support and, in order, above the non-magnetic support; a radiation-cured material layer cured by exposing a layer consisting essentially of a radiation curable compound to radiation; a non-magnetic layer comprising a non-magnetic powder and a binder; and a magnetic layer comprising a ferromagnetic powder and a binder; the radiation curable compound comprising a compound having one or more ether groups and three or more radiation curable functional groups per molecule; and the number of magnetic layer surface micro projections having a height measured by atomic force microscopy (AFM) of 10 to 20 nm being 5 to 1,000 per 100 (μm) 2 ; wherein the radiation-cured material layer has a thickness of 0.2 to 0.8 μm, the radiation curable compound has no cyclic structure, the radiation curable functional group is a (meth)acrylic acid residue, the radiation curable compound has 3 to 6 (meth)acrylic acid residues per molecule, the radiation curable compound has 1 to 3 ether groups per molecule, and the radiation curable compound is selected from the group consisting of dipentaerythritol hexaacrylate, a propionic acid-modified dipentaerythritol tetraacrylate, a propionic acid-modified dipentaerythritol triacylate, ditrimethylolpropane tetraacrylate, and a caprolactone-modified dipentaerythritol hexaacrylate.