Magnetic recording media and method for making them

Details Magnetic recording media and method for making them Magnetic recording media and method for making them

1994-06-20

1996-07-02

Kiliman, Leszek

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428332, 428336, 428694B, 428694BA, 428694BR, 428694BM, 428900, 427128, 427131, G11B 566, B32B 310, B32B 516

Patent

active

055320414

ABSTRACT:
A magnetic recording medium records two or more signals having different frequency bands by frequency multiplex recording. The non-magnetic substrate includes a first magnetic layer and a second magnetic layer on that order, said second magnetic layer having a thickness amounting to 70% or less of the shortest recording wavelength of the signals to be recorded.

REFERENCES:
patent: 4624883 (1986-11-01), Yamaguchi et al.
patent: 4624894 (1986-11-01), Kishimoto
patent: 4741953 (1988-05-01), Katsuta et al.
patent: 4959263 (1990-09-01), Aonuma et al.
patent: 4992330 (1991-02-01), Kawahara et al.
patent: 5043210 (1981-08-01), Yomohowe

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