THIN-FILM MAGNETIC HEAD COMPRISING A FIRST POLE LAYER HAVING...

Details THIN-FILM MAGNETIC HEAD COMPRISING A FIRST POLE LAYER HAVING... THIN-FILM MAGNETIC HEAD COMPRISING A FIRST POLE LAYER HAVING...

2005-09-06

2005-09-06

Evans, Jefferson (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Coil

C360S125330

Reexamination Certificate

active

06940689

ABSTRACT:
A thin-film magnetic head comprises a medium facing surface, a bottom pole layer, a top pole layer, a coupling portion, a recording gap layer, and a thin-film coil. The coupling portion is disposed away from the medium facing surface and couples the bottom pole layer to the top pole layer. The recording gap layer is disposed between the pole portion of the bottom pole layer and the pole portion of the top pole layer. The bottom pole layer incorporates: a first layer disposed to face toward the thin-film coil; a second layer, a third layer and a fourth layer that are disposed near the medium facing surface; and a coupling layer disposed away from the medium facing surface and coupling the bottom pole layer to the top pole layer. The thin-film coil incorporates a first coil having turns part of which are disposed between the second layer and the coupling layer; a second coil having turns at least part of which are disposed between turns of the first coil; and a connecting layer disposed on a side of the third layer and connecting the first coil to the second coil in series.

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