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AssigneesKonica Corporation, TDK Corporation
InventorsTakahiro Mori, Kunitsuna Sasaki, Hisato Kato, Kazuyoshi Imai, Takahiro Hayashi
Estimating the term…
Disclosed are a magnetic recording medium which comprises a non-magnetic support, one or more coating layers provided on the non-magnetic support and an upper layer of the coating layers being a magnetic layer containing ferromagnetic metallic powder with the total thickness of the coating layers being 0.5 to 2.5 .mu.m, wherein the magnetic layer has a surface roughness Ra of 1.0 to 4.6 nm and a surface roughness R10z of 8.0 to 35.0 nm, which satisfy the relations of: Ra.ltoreq.-0.47t+0.5/t+3.8 and R10z.ltoreq.-1.50t+6.0/t+23.0 where t is the total thickness of the coating layers in terms of .mu.m, and an aliphatic acid ester is contained in the surface portion of the magnetic layer in an amount of 5 to 50 mg/m.sup.2, and a process for preparing the same.
A magnetic recording medium comprising a non-magnetic support having provided thereon two or more coating layers, an uppermost of said coating layers being a magnetic layer containing a ferromagnetic metal powder, a lower of said coating layers being a non-magnetic layer containing a non-magnetic powder, a total thickness of said coating layers being 0.5 to 2.5 microns,
A process for preparing a magnetic recording medium comprising;
Dependencies are inferred from the claim text.