Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2005-04-05
2005-04-05
Miller, Brian E. (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
C360S319000, C360S322000
Reexamination Certificate
active
06876524
ABSTRACT:
A magnetoresistive transducer includes a magnetoresistive (MR) film interposed between domain control layers along the surface of a lower non-magnetic gap layer. Lead layers are formed on the domain control layers. An upper non-magnetic gap layer and an upper shield layer are sequentially formed to extend over the MR film and the lead layers. The upper shield layer is opposed to the surfaces of the MR element and the lead layers at a flat boundary or interface. The residual magnetization is supposed to exist in the upper shield layer in the direction of the magnetization established in the domain control layers after the upper shield layer has been subjected to the applied magnetic field for the magnetization of the domain control layers. The residual magnetization can be kept continuous along the flat interface of the upper shield layer. Any magnetic poles are hardly generated along the interface of the upper shield layer. The longitudinal bias field can be prevented from receiving the interaction of the residual magnetization in the upper shield layer. Reduction in the longitudinal bias field can thus be suppressed.
REFERENCES:
patent: 4918554 (1990-04-01), Bajorek et al.
patent: 5800935 (1998-09-01), Ishi
patent: 5872689 (1999-02-01), Gill
patent: 6094328 (2000-07-01), Saito
patent: 6256177 (2001-07-01), Urai et al.
patent: 6313973 (2001-11-01), Fuke et al.
patent: 6333842 (2001-12-01), Nobuyuki et al.
patent: 6341052 (2002-01-01), Hayashi
patent: 6344955 (2002-02-01), Sato et al.
patent: 6347022 (2002-02-01), Saito
patent: 6369993 (2002-04-01), Hayashi
patent: 6396669 (2002-05-01), Gill
patent: 6434814 (2002-08-01), Chang et al.
patent: 6447935 (2002-09-01), Zhang et al.
patent: 6657824 (2003-12-01), Onuma
patent: 4161874 (1992-06-01), None
patent: 9-007122 (1997-01-01), None
Tagawa Ikuya
Yamada Ken'ichiro
Fujitsu Limited
Greer Burns & Crain Ltd.
Miller Brian E.
LandOfFree
Magnetoresistive transducer having stronger longitudinal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetoresistive transducer having stronger longitudinal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetoresistive transducer having stronger longitudinal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3427092