Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1997-02-24
1998-05-12
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Head
Hall effect
360126, G11B 533, G11B 5147
Patent
active
057515263
ABSTRACT:
A flux enhanced data transducer and method for producing the same in conjunction with shared shields on MR read heads in which substantially between 500-2500 .ANG. of a relatively higher magnetic moment material is added to the upper surface of the shared shield, or bottom write head pole, prior to a magnetic flux containment ion milling operation utilizing the upper pole as a mask. The relatively higher magnetic moment flux enhancement layer may comprise CoNiFe, FeN or similar material which is deposited prior to the formation of the dielectric gap layer. The flux enhancement layer may then be selectively removed substantially surrounding the upper pole by means of a relatively brief ion milling process in which only on the order of 1.0 k.ANG. of the layer need be removed and during which only an insignificant amount of the material removed might be re-deposited on the sides of the upper pole.
REFERENCES:
patent: 5264981 (1993-11-01), Campbell et al.
patent: 5315469 (1994-05-01), McNeil
patent: 5379172 (1995-01-01), Liao
patent: 5493464 (1996-02-01), Koshikawa
Kubida William J.
Letscher George J.
Levy Stuart S.
MKE-Quantum Components Colorado LLC
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