Method of making a magnetic head assembly

Details Method of making a magnetic head assembly Method of making a magnetic head assembly

1978-04-17

1979-07-10

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

360103, 360118, G11B 542

Patent

active

041603150

ABSTRACT:
In methods of making head assemblies, a ceramic slider having a row of receiving apertures is united with a multiple serial ferrite arch structure shaped in complementary fashion so that successive arches thereof register within the apertures to define erase pole pieces. The face of the resulting assembly is ground flat and parallel to the arch base and the bridges thus formed on the base side may be separated between the arches. The assembly is then bisected along the row of pole pieces into complementary halves, and the facing surfaces are ground and lapped to provide a desired width for the erase member formed by the pole piece half and associated leg of one of the ferrite arches. Grooves are cut into the bisected surfaces at the pole pieces to define the erase track width and the erase gap length for the erase member. A read/write magnetic head structure is separately batch fabricated in the form of core strips, with side faces that are precisely parallel and smooth, and this is unified in a magnetic head assembly between pairs of opposite erase members embedded in the slider halves. Thereafter, the serial assembly is sectioned into individual heads, and the magnetic circuits completed for the read/write head and the erase head.

REFERENCES:
patent: 3789505 (1974-02-01), Huntt
patent: 3964103 (1976-06-01), Thompson et al.

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