Magnetic recording medium and method for producing the same

Details Magnetic recording medium and method for producing the same Magnetic recording medium and method for producing the same

1991-04-19

1992-10-20

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428329, 4284259, 428694, 428900, 427128, 427131, G11B 2300

Patent

active

051569086

ABSTRACT:
A magnetic recording medium improved in reproduced output over a wide wavelength region, and methods for producing the same are disclosed, the magnetic recording medium having at least two magnetic layers each containing ferromagnetic powders dispersed in binders, which medium comprises a lower magnetic layer containing an acicular ferromagnetic powder having a coercive force of 600 to 2,000 Oe and an upper magnetic layer containing a plate-shaped ferromagnetic alloy powder having a coercive force of 1,000 to 5,000 Oe, a saturation magnetization of 90 to 150 emu/g and an axis easily magnetizable vertically to a plate surface.

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patent: 4624894 (1986-11-01), Kishimoto et al.
patent: 4643941 (1987-02-01), Miyoshi et al.
patent: 4911997 (1990-03-01), Asai et al.
patent: 4980230 (1990-12-01), Saito et al.

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