Longitudinal multi-layer magnetic recording medium

Details Longitudinal multi-layer magnetic recording medium Longitudinal multi-layer magnetic recording medium

2007-09-25

2007-09-25

Chaney, Carol (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Binder media

C428S800000, C428S678000

Reexamination Certificate

active

10856094

ABSTRACT:
A magnetic recording medium capable of attaining high in-plane recording density of 100 Mbits or more per 1 mm2is provided. Magnetic recording medium is provided in which underlayers, a first magnetic layer, a first intermediate layer, a second magnetic layer, a second intermediate layer, a third magnetic layer, a protection layer and lubrication layer are formed in this order above a substrate. Each of the third magnetic layer and the second magnetic layer comprises a Co-based alloy containing at least Pt, Cr and B. The concentration of Pt contained in the second magnetic layer is not more than that in the third magnetic layer.

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