Bilayer magnetic structure for high density recording media

Details Bilayer magnetic structure for high density recording media Bilayer magnetic structure for high density recording media

2005-11-22

2005-11-22

Bernatz, Kevin M. (Department: 1773)

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

C428S637000, C428S668000, C428S678000, C428S690000, C428S690000

Reexamination Certificate

active

06967061

ABSTRACT:
High density longitudinal magnetic recording media are formed with two magnetic layers for enhanced SMNR, high signal, low PW 50 and high resolution. The bilayer magnetic structure comprises a first magnetic layer optimized for SMNR and a second magnetic layer formed directly on the first magnetic layer and optimized for Ms. Embodiments of the present invention include first and second magnetic layers containing Co, Cr and Pt, wherein the first magnetic layer has a higher Cr content than the second magnetic layer and the second magnetic layer has a higher Co content than the first magnetic layer.

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