Metal working – Method of mechanical manufacture – Electrical device making
Patent
1984-06-05
1986-07-01
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29593, 29606, 336219, 336233, H01F 706
Patent
active
045971692
ABSTRACT:
A microcoil having a winding on a composite core made up of a portion of substantially magnetic material and a portion of substantially non-magnetic material. The winding is split so that a part of the magnetic material core portion is exposed, and a laser is used to remove material from the exposed part of the magnetic core portion. The inductance of the coil is measured during the removal of the magnetic material, and the inductance of the coil is trimmed to a desired value through the removal of an appropriate amount of magnetic material. The non-magnetic core portion serves as a support structure for the portions of the winding on the core even if a substantial portion of the magnetic material is removed.
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Hall Carl E.
Standex International Corporation
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