Magnetic head with a vertically laminated back gap structure...

Details Magnetic head with a vertically laminated back gap structure... Magnetic head with a vertically laminated back gap structure...

2005-06-21

2005-06-21

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Core

C029S603150

Reexamination Certificate

active

06909579

ABSTRACT:
A magnetic write head having a vertically laminated back gap structure and method of making the same are disclosed. The magnetic head is formed with lower and upper pole pieces and a back gap structure which connects the lower and the upper pole pieces in a back gap region. In one illustrative example, the back gap is a vertically laminated structure having alternating layers of magnetic and non-magnetic materials. Each alternating layer is perpendicular to both the lower and the upper pole pieces. This vertically laminated structure significantly reduces the eddy currents in the back gap region at high operating frequencies as the layers are oriented in a direction parallel with the magnetic flux.

REFERENCES:
patent: 3829896 (1974-08-01), Brock et al.
patent: 5314596 (1994-05-01), Shukovsky et al.
patent: 6195229 (2001-02-01), Shen et al.

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