Thin film magnetic write head

Details Thin film magnetic write head Thin film magnetic write head

1994-02-08

1995-09-19

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360119, 360126, G11B 5127, G11B 523

Patent

active

054521645

ABSTRACT:
A thin film magnetic write head is provided wherein the write head has a pole tip region between a planar air bearing surface (ABS) and a zero throat level and a back region which extends back from the zero throat level to and including a back gap. The write head has a yoke which includes top and bottom magnetic poles. Each pole has a pole tip structure in the pole tip region and a back portion in the back region. The pole tip structure of the bottom pole has bottom and top pole tip elements PT1a and PT1b and the pole tip structure of the top pole has a top and bottom pole tip elements PT2a and PT2b. The pole tip elements PT1b and PT2b are located between the pole tip elements PT1a and PT2a and a gap layer G is located between the pole tip elements PT1b and PT2b. Each of the pole tip elements PT1b and PT2b and the gap layer G are bounded by front and back walls and first and second sidewalls. The first sidewalls of the pole tip elements PT1b and PT2b and the gap layer G are aligned with respect to one another and the second sidewalls of the pole tip elements PT1b and PT2b and the gap layer G are aligned with respect to one another. The front walls of the pole tip elements PT1b and PT2b and the gap layer G lie in a common plane which forms a portion of the ABS. The back walls of the pole tip elements PT1b and PT2b and the gap layer G lie in a common plane which forms the zero throat level. The common plane of the zero throat level is substantially parallel to the common plane of the ABS.

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