Method of manufacturing magnetic heads

Details Method of manufacturing magnetic heads Method of manufacturing magnetic heads

1976-07-08

1977-09-06

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

G11B 542

Patent

active

040458644

ABSTRACT:
A method is provided of manufacturing magnetic heads which comprises the steps of providing a pair of core block pieces each having a gap defining surface, masking a pair of spaced areas of the gap defining surface of one core block piece, subjecting the gap defining surface of said one core block piece to etching by an ion beam or plasma sputtering, disposing the etched core block piece and the other non-etched core block piece in abutting relationship so that the respective gap defining surfaces are located opposite to each other, placing a gap forming material in a clearance formed between the gap defining surfaces of the both core block pieces as a result of the etching step applied to one of the gap defining surfaces, causing the gap forming material to melt and permeate into the clearance, and subsequently causing the gap forming material to solidify to provide a core block, which is cut to size to produce a core or cores.

REFERENCES:
patent: 3605258 (1971-09-01), Fisher et al.
patent: 3629519 (1971-12-01), Hanak
patent: 3819348 (1974-06-01), Murray

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