Trimmable electrical inductors and method of making the same

Details Trimmable electrical inductors and method of making the same Trimmable electrical inductors and method of making the same

H - Electricity

05

K

26/119, 356/12,

H05K 1/16 (2006.01) H01F 5/00 (2006.01) H01F 17/00 (2006.01) H01R 4/48 (2006.01)

Patent

CA 1154111

ABSTRACT OF THE DISCLOSURE Trimming either a thin or thick film inductor located on one surface of an electrically non-conductive substrate is achieved by applying to the opposite surface of the substrate a layer of highly conductive metal or of magnetic material of high resistivity. When a highly con- ductive metal is used, the inductance is decreased. Pro- gressively reducing either the thickness or the area of the layer, as by grinding, progressively increases the inductance until all of the metal layer has been removed. When a magnetic layer is used, the inductance is increased by an amount dependent on the thickness and the area of the magnetic layer.

361730

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