Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-02-19

1987-07-07

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

427131, 428323, 428328, 428332, 428694, 428900, G11B 568

Patent

active

046786970

ABSTRACT:
A magnetic recording medium is described, comprising a non-magnetic support having coated thereon on opposite surfaces a magnetic layer containing a magnetic substance and a binder-containing backing layer, wherein the magnetic layer has a light transmittance of 2% or more for light having a wavelength of 900 nm, the backing layer has a transmittance of from 1 to 10% for light having a wavelength of 900 nm, the magnetic recording medium as a whole has a transmittance of 1% or less for light having a wavelength of 900 nm, and the backing layer has a center line average roughness (Ra) of 0.05 .mu.m or less at a cut-off value of 0.08 mm.

REFERENCES:
patent: 4135031 (1979-01-01), Akashi et al.
patent: 4474843 (1984-10-01), Miyoshi et al.
patent: 4532178 (1985-07-01), Matsumoto
patent: 4547425 (1985-10-01), Naruse
patent: 4555431 (1985-11-01), Miyatsuka
patent: 4562117 (1985-12-01), Kikukawa et al.

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