Process for producing a magnetic read - write head and head obta

Details Process for producing a magnetic read - write head and head obta Process for producing a magnetic read - write head and head obta

1985-01-30

1987-01-27

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

20419232, 29603, 29576W, 360122, 360123, 360125, G11B 5127, G11B 517, G11B 5187, B44C 122

Patent

active

046392890

ABSTRACT:
A first magnetic material film is deposited on a support, a groove is etched in the first magnetic film which is shaped like a figure eight, a double coil is formed and is wound respectively around the two central pole pieces. An insulating material layer is deposited and etched in step form, the step having a side facing the central channel. An magnetic film is deposited on the thus etched step, and the film is etched so as to only leave a wall perpendicular to the plane of the films. This is followed by the deposition of a magnetic film and then a protective layer, the assembly being divided off so as to expose two pole pieces separated by an air gap.

REFERENCES:
patent: 4025411 (1977-05-01), Hom-Ma et al.
patent: 4256514 (1981-03-01), Pogge
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IBM Technical Disclosure Bulletin, vol. 15, No. 2, Jul. 1972, pp. 516-517, Armonk, New York, US; R. B. Watrous: "Horizontal Thin-Film Head with Symmetrical Windings".
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