Method of manufacture of miniaturized transformer

Details Method of manufacture of miniaturized transformer Method of manufacture of miniaturized transformer

1982-07-30

1985-10-22

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29846, 29851, 336200, H01F 4106

Patent

active

045479615

ABSTRACT:
A miniaturized thick-film isolation transformer comprising two rectangular substrates each carrying successive screen-printed thick-film layers of dielectric with spiral planar windings embedded therein. The spiral windings comprise conductors formed of fused conductive particles embedded within a layer of dielectric insulating means solidified by firing at high temperature to form a rigid structure with the windings hermetically sealed within the dielectric and conductively isolated from each other within the transformer. The substrates are formed at opposite ends thereof with closely adjacent connection pads all located at a single level to accommodate automated connection making. Connections between the pads and the windings are effected by conductors formed of fused conductive particles. The substrates and the dielectric layers are formed with a central opening in which is positioned the central leg of a three-legged solid magnetic core. The remaining portions of the core surround the two substrates to form a compact rugged construction especially suitable for assembly with hybrid integrated circuit components.

REFERENCES:
patent: 3518756 (1970-07-01), Bennett et al.
patent: 3685144 (1972-08-01), Trimble
"Printed Delay Line"; Altmann et al.; IBM Tech. Disclosure Bulletin; vol. 8, No. 5; Oct. 1965.

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