Method for producing a gap spacer for magnetic heads

Details Method for producing a gap spacer for magnetic heads Method for producing a gap spacer for magnetic heads

1988-12-08

1989-12-05

Hall, Carl E.

Metal founding

Process

Shaping liquid metal against a forming surface

29424, 29603, 164131, 427250, 427272, 427282, B22D 2300

Patent

active

048846236

ABSTRACT:
In production of a gap spacer for magnetic heads in electric and electronic appliances, accumulation of a non-magnetic material insoluble to acids or alkalis on a thin base soluble to these solvents is employed with use of a proper mask as a substitute for the conventional rolling process. Stable growth in thickness of the non-magnetic material during the accumulation process assures highly precise thickness uniformity of the product via easy time control of the process and absence of the rolling process allows broader freedom in choice of the material.

REFERENCES:
patent: 1646297 (1927-10-01), Lindsay
patent: 2384229 (1945-09-01), Ammann
patent: 3891735 (1975-06-01), North et al.

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