Magnetic recording medium with dual layer front coating and...

Details Magnetic recording medium with dual layer front coating and... Magnetic recording medium with dual layer front coating and...

2007-01-16

2007-01-16

Bashore, Alain L. (Department: 1762)

Coating processes

Magnetic base or coating

C427S130000, C427S131000, C427S403000, C428S403000

Reexamination Certificate

active

10898136

ABSTRACT:
A magnetic recording medium including a non-magnetic substrate, a back coat, a lower layer, and a magnetic upper layer. The substrate defines a front side and back side, with the back coat being formed on the back side. The lower layer is disposed over the front side of the substrate and includes a primary powder material and conductive carbon black material dispersed in a binder. The primary lower layer powder material comprises particles having a coercivity of less than 300 Oe coated with an electroconductive material. The magnetic upper layer is disposed over the lower layer and includes a magnetic powder dispersed in a binder.

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