Multi-layer magnetic recording medium, method and system of manufacture
AssigneeQuantegy, Inc.
InventorsRyosuke Isobe, Guy M. Tadlock, Brian McQuay
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Abstract
A multi-layer magnetic recording medium and a method for making a multi-layered magnetic recording media as described. The recording medium has magnetic inner layer with magnetic particles having a specific squareness ratio and saturation magnetization which results in superior high frequency output and improved overwrite characteristics. The method for making a magnetic recording medium involves controlled, partial drying of the inner layers to avoid intermixing of the respective layers while facilitating efficient fabrication.
Claims24
A multi-layer magnetic recording medium comprising a nonmagnetic substrate having provided thereon a magnetic inner layer having a squareness ratio of from 0.10 to 0.65, and a saturation magnetization from 1.0×10−4 to 1.5×10−3 gauss-meters, and a magnetic outer layer containing ferromagnetic particles.
A multi-layer magnetic recording tape comprising a nonmagnetic substrate having provided thereon a magnetic inner layer having a thickness of 0.1 to 3.0 mm, a squareness ratio of from 0.10 to 0.65, and a saturation magnetization of from 1.0×10−4 to 1.5×10−3 gauss-meter, and a magnetic outer layer with a thickness of 0.05 to 1.0 μm containing ferromagnetic particles.
Dependencies are inferred from the claim text.