Stock material or miscellaneous articles – Magnetic recording component or stock – Thin film media
Reexamination Certificate
2005-08-19
2010-11-16
Bernatz, Kevin M (Department: 1785)
Stock material or miscellaneous articles
Magnetic recording component or stock
Thin film media
C428S829000
Reexamination Certificate
active
07833640
ABSTRACT:
An improved structure for the construction of perpendicular recording media is disclosed. The structure includes a tri-layer IML resident between a soft under layer CoTaZr film and a CoPtCr—SiO2magnetic media. In an embodiment, the tri-layer comprises a RuxCr1−xlayer over dual nucleation layers of Ni—Fe and Ni—Fe—Cr. The tri-layer replaces the typical Ru and Ni—Fe intermediate layers of the prior art, resulting in considerable improvement in lattice matching between the Ru containing intermediate layer and the CoPtCr—SiO2magnetic media, further resulting in improved magnetic media performance.
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English language translation of JP 10-228620-A (PTO 04-2291).
Matsnunuma et al., “Very High Density and Low Cost Perpendicular Magnetic Recording Media Including New Layer Strucure ‘U-Mag’”, IEEE Trans on Magnetics, vol. 41, No. 2, Feb. 2005, p. 572-576.
Marinero Ernesto E.
Supper Natacha Frederique
York Brian R.
Bernatz Kevin M
Hitachi Global Storage Technologies - Netherlands B.V.
Lorimer D'Arcy H.
Lorimer Labs
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