Composite thin-film magnetic head with non-magnetic...

Details Composite thin-film magnetic head with non-magnetic... Composite thin-film magnetic head with non-magnetic...

2006-02-07

2009-06-02

Renner, Craig A (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S319000, C360S324200

Reexamination Certificate

active

07542245

ABSTRACT:
Composite thin-film magnetic head includes a substrate; a first insulation layer on the substrate; an MR read head element on the first insulation layer and provided with a lower shield layer, an upper shield layer and an MR layer with a sense current flowing perpendicular to a surface of the MR layer though the upper and lower shield layers; a second insulation layer on the MR read head element; an inductive write head element on the second insulation layer and provided with a lower magnetic pole layer, a recording gap layer, an upper magnetic pole layer with end portion opposed to an end portion of the lower magnetic pole layer through the recording gap layer and a write coil; and a nonmagnetic conductive layer electrically conducted with the lower shield layer and opposed to the substrate to increase the electrode area between the lower shield layer and the substrate.

REFERENCES:
patent: 6181537 (2001-01-01), Gill
patent: 2002/0149887 (2002-10-01), Sato
patent: 2006/0044701 (2006-03-01), Funayama
patent: 2001-236614 (2001-08-01), None
Klaas B. Klaassen et al. “Write-to-Read Coupling.” IEEE Transactions on Magnetics. vol. 38, No. 1. pp. 61-67. Jan. 2002.

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