Machine for testing planar magnetic film with magnetic bubbles

Details Machine for testing planar magnetic film with magnetic bubbles Machine for testing planar magnetic film with magnetic bubbles

1980-05-29

1982-11-23

Strecker, Gerald R.

Electricity: measuring and testing

Magnetic

Magnetic information storage element testing

365 1, G01R 3312, G11C 1908

Patent

active

043607756

ABSTRACT:
Machine for testing planar magnetic film with magnetic bubbles and which comprises a testing device and a magnetic head, wherein the magnetic head incorporates two polarization coils in the Helmholtz position and whereof the common axis is normal to the plane of the magnetic film and two flat coils whose axes are perpendicular to one another and parallel to the plane of the magnetic film, the first of the polarization coils being arranged within the flat coils which are themselves arranged one within the other and on the same side of the magnetic film, while the test device and the second polarization coil are arranged on the other side of the magnetic film.

REFERENCES:
patent: 3219922 (1965-11-01), James et al.
patent: 3254298 (1966-05-01), Ellis et al.
patent: 3987363 (1976-10-01), Roos et al.
patent: 4213091 (1980-07-01), Cooper

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