Method of making edge protected ferrite core

Details Method of making edge protected ferrite core Method of making edge protected ferrite core

1983-06-23

1984-05-29

Demers, Arthur P.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204192D, 204192N, 204298, C23C 1500

Patent

active

044513445

ABSTRACT:
The sputter deposition of a thin film of material on both sides of a thin substrate is performed by positioning the substrate sides orthogonal to the target and preferably radial to the deposition center of the sputter system. The vapor deposition of alumina on a thin ferrite core for a magnetic head is accomplished by positioning the ferrite substrate in the vacuum chamber orthogonally to the target and radial to the particle deposition center. The alumina is deposited on both sides of the ferrite core simultaneously to substantially the same thickness. The deposition on both sides of the ferrite core protects the core against width erosion, and minimizes bending stress. In addition, signal output of the ferrite core when used in a magnetic head is increased.

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patent: 4289598 (1981-09-01), Engle

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