Method of producing a core for a magnetic head

Details Method of producing a core for a magnetic head Method of producing a core for a magnetic head

1990-09-10

1991-11-12

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

427130, G11B 542

Patent

active

050636537

ABSTRACT:
A method of producing a ferrite/Sendust composite core for a magnetic head, in which a metal film made of any one of metals of Zn, Cr, Fe, Cd, Co, Ni, Sn and Pb is formed on a surface, where a track of the core is formed, of a gapped bar composed of ferrite and Sendust, before the gapped bar is subjected to a laser-induced etching in an alkali metal hydroxide aqueous solution. The metal film serves to prevent the formation of dull at an edge portion of the track, so that a magnetic core can be obatined having a track which is free from dulls and high in reliability.

REFERENCES:
patent: 4896417 (1990-01-01), Sawada et al.

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