Low profile thin film write head

Details Low profile thin film write head Low profile thin film write head

1995-11-17

1997-04-15

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

360125, 360110, 2960307, G11B 5147, G11B 5127

Patent

active

056215967

ABSTRACT:
A thin film low profile write head is provided which has first and second pole pieces which are magnetically connected in a pole tip region and at a back gap. The pole tip region is located between the head surface and a zero throat height and the head has a body region which is located between the zero throat height and the back gap. A plurality of insulation layers are located above the first pole piece in the body region. Each of the insulation layers has an apex where the insulation layer commences and each insulation layer extends from its apex toward the back gap. The plurality of insulation layers typically includes first, second and third insulation layers. In the preferred embodiment the apex of the second insulation layer is located at and defines the zero throat height of the head. This enables a very narrow track width second pole tip to be constructed simultaneously with the second pole piece using ordinary photolithography processes. Further it enables the insulation layers, the coil layer and the second pole piece to be thinner than prior art layers.

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patent: 5256266 (1993-10-01), Blanchette et al.
patent: 5435053 (1995-07-01), Krounbi et al.

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