Magnetic recording medium
AssigneeTDK Electronics Co., Ltd.
InventorsSeitoku Saito, Hideo Kobayashi
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Abstract
A magnetic recording medium obtained by coating a magnetic metallic powder with a binder on a non-magnetic substrate, wherein said magnetic metallic powder is mainly made of acicular particles obtained by a dry reduction process and said magnetic recording medium has a residual magnetic flux density of greater than 2,600 gauss, a coercive force of 1,300 to 1,800 Oe, a thickness of a magnetic layer of 1.5 to 3.5 .mu.m and a C/N ratio (carrier signal/noise level) in video band of greater than 4 dB of the C/N ratio of the standard video tape.
Claims2
A magnetic recording tape of a width of 1/4 inch having a residual magnetic flux density of greater than 2,600 gauss, a coercive force of 1,300 to 1,800 Oe, a thickness of a magnetic layer of 1.5 to 3.5 .mu.m and a C/N ratio (carrier signal/noise level) in video band of greater than 4 dB of the C/N ratio of the standard video tape, said tape comprising a non-magnetic substrate coated with a composition comprising a magnetic metallic powder and a binder, the magnetic metallic powder comprising mainly acicular particles obtained by the dry reduction of an acicular iron oxide or oxyhydroxide in a hydrogen gas atmosphere at high temperature.
Dependencies are inferred from the claim text.