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US 6,643,105 B2Granted
Magnetic head having magnetic shield layers
AssigneeHitachi, Ltd.
InventorsKazuhiro Nakamoto, Hiroyuki Hoshiya, Takashi Kawabe, Hiromasa Takahashi, Hisashi Kimura, Katsuro Watanabe, Chiaki Ishikawa, Kaori Totsuka
Life of this patent
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Abstract
A magnetic head include a pair of magnetic shield layers, a pair of gap layers formed between the pair of magnetic shield layers, a magnetoresistive layer arranged between the pair of gap layers, and a pair of electrodes electrically connected to the magnetoresistive layer. At least one of the pair of magnetic shield layers is formed as a discontinuous multi-layer or as a mixed layer.
Claims2
A magnetic head comprising:
- a pair of magnetic shield layers;
- a pair of gap layers provided between said pair of magnetic shield layers;
- a magnetoresistive element provided between said pair of gap layers;
- wherein at least one of said pair of magnetic shield layers is comprised of a ferromagnetic material and an insulating material and a ratio of said ferromagnetic material and said insulating material is in a range of 1:2 to 3:1;
- and
- wherein a structure of at least one of said pair of magnetic shield layers comprises a particle of said ferromagnetic material which is enclosed with said insulating material.
3 more elements
A magnetic head comprising:
- a pair of magnetic shield layers;
- a pair of gap layers provided between said pair of magnetic shield layers;
- a magnetoresistive element provided between said pair of gap layers;
- wherein at least one of said pair of magnetic shield layers is comprised of a ferromagnetic material and an insulating material and a ratio of said ferromagnetic material and said insulating material is in a range of 1:2 to 3:1;
- and
- wherein a structure of at least one of said pair of magnetic shield layers comprise a discontinuous layer of said ferromagnetic material which is separated by said insulating material.
3 more elements
Dependencies are inferred from the claim text.