Multilayer magnetic recording medium

Details Multilayer magnetic recording medium Multilayer magnetic recording medium

1978-06-16

1981-03-31

Silverman, Stanley S.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

360134, 360135, 360136, 427131, 428212, 428336, 428339, 428693, 428900, 428694, H01F 1002

Patent

active

042593921

ABSTRACT:
A magnetic recording tape comprising a non-magnetic support having thereon a dual layer magnetic recording coating comprising ferromagnetic particles dispersed in a binder, wherein the fine ferromagnetic particles of the outer layer are a mixture of two or more kinds of fine ferromagnetic particles having two or more peaks in the coercive force distribution and said particles containing at least one kind of fine ferromagnetic alloy particles and the fine ferromagnetic particles of the inner layer being ferromagnetic iron oxide particles having peaks in the coercive force distribution lower than the minimum peaks in the coercive force distribution of the ferromagnetic particles of the outer layer, with the thickness of the outer layer not being greater than the thickness of the inner layer.

REFERENCES:
patent: 3740266 (1973-06-01), Akashi et al.
patent: 4075384 (1978-02-01), Suzuki et al.

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