Thin film magnetic head device having a core recess set to a pre

Details Thin film magnetic head device having a core recess set to a pre Thin film magnetic head device having a core recess set to a pre

1992-03-19

1995-11-21

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

29603, G11B 5187, G11B 5127

Patent

active

054693128

ABSTRACT:
There is disclosed a thin film magnetic head device of a structure such that a thin film magnetic head having a metal magnetic film as a magnetic core is directly formed on a slider by the thin film forming technology, thus to carry out recording onto a hard disk and reproducing therefrom. When polishing processing is implemented on an air bearing surface of the slider, the magnetic core (metal magnetic film) of the thin film magnetic head is withdrawn from the air bearing surface by a difference in polishing rate. A quantity of removal (core recess) at this time is set in a range such that the spacing loss is 0.5 to 1.5 dB. Accordingly, while the core recess varies depending upon a track recording density, it is set in this invention within a region indicated by slanting lines of FIG. 8 on the basis of a maximum value of a tracking recording density to be attained.

REFERENCES:
patent: 4893203 (1990-01-01), Ezaki et al.
patent: 5083365 (1992-01-01), Matsumoto

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