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AssigneeFuji Photo Film Co., Ltd.
InventorsMasatoshi Takahashi, Hitoshi Noguchi, Junichi Nakamikawa
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A magnetic recording medium is described, which comprises a support having thereon a substantially nonmagnetic lower layer and a magnetic layer comprising a ferromagnetic metal powder or a ferromagnetic hexagonal ferrite powder dispersed in a binder provided on the lower layer, which is a magnetic recording medium for recording signals of from 0.17 to 2 G bit/inch2 of areal recording density, wherein the dry thickness of the magnetic layer is from 0.05 to 0.30 μm , φm is from 10.0×10−3 to 1.0×10−3 emu/cm2, the coercive force of the magnetic layer is 1,800 Oe or more, and a filler having an average particle size of from 0.05 to 0.3 μm is present on the surface layer of the support in an amount of from 5,000,000 to 30,000,000/mm2.
A magnetic recording medium which comprises a support having thereon a substantially nonmagnetic lower layer and, disposed thereupon, a magnetic layer comprising a ferromagnetic metal powder or a ferromagnetic hexagonal ferrite powder dispersed in a binder provided on the lower layer, which is a magnetic recording medium for recording signals of 0.17 to 2 G bit/inch2 of areal recording density, wherein the dry thickness of the magnetic layer is 0.05 to 0.30 μm, φm is from 10.0×10−3 to 1.0×10−3 emu/cm2, the coercive force of the magnetic layer is 1,800 Oe or more, and a filler having an average particle size of 0.05 to 0.3 μm is present on both of the surfaces of the support in an amount from 5,000,000 to 30,000,000/mm2.
Dependencies are inferred from the claim text.