Stock material or miscellaneous articles – Magnetic recording component or stock – Magnetic head
Reexamination Certificate
2005-03-18
2009-02-03
Bernatz, Kevin M (Department: 1794)
Stock material or miscellaneous articles
Magnetic recording component or stock
Magnetic head
C428S815200, C360S125080, C360S125120, C360S125240, C360S125260, C360S125450, C360S125500, C360S125580, C360S125630
Reexamination Certificate
active
07485378
ABSTRACT:
A magnetic film capable of generating strong magnetic fields even in a high frequency region, a manufacturing method therefore and a thin film magnetic head capable of recording even in a high frequency region are provided. In one embodiment, the magnetic film is manufactured by using a 88FeNi film of 200 nm thick having minimum Hk of 0.32 Oe (25.6 A/m) as a main magnetic film and selecting a 20 wt % FeNi film of a similar FeNi alloy plating film having low Hk and low Hc as an interlayer material. A stacked film comprising (88FeNi/20FeNi)×10 layers is prepared so that the total thickness of the main magnetic film is 2 μm. The 88FeNi film is prepared by application of a DC current in a 88FeNi plating bath, and the 20FeNi film is prepared by pulse plating successively in the same bath.
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JPO Abstract Translation of JP 05-006834 A (PAT-No. JP405006834A).
Derwent Abstract Translation of WO 2004/055784 A1 (Derwent Acc-No. 2004-543284).
Machine Translation of JP 05-006834-A.
Kudo Kazue
Maruyama Youji
Oikawa Gen
Shiina Hiromi
Bernatz Kevin M
Hitachi Global Storage Technologies - Netherlands B.V.
Nader Rambod
Townsend and Townsend / and Crew LLP
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