Monolithic magnetic device with printed circuit interconnections

Details Monolithic magnetic device with printed circuit interconnections Monolithic magnetic device with printed circuit interconnections

1992-10-09

1994-04-05

Kozma, Thomas J.

Inductor devices

Core surrounding linear conductor

29606, 336195, 336200, 336232, H01F 500, H01F 2728

Patent

active

053009118

ABSTRACT:
A monolithic magnetic device having a plurality of transformer elements having single turn primaries and single turn secondaries fabricated on a plate of ferrite which has the outline of a ceramic leadless chip carrier. Each of the magnetic elements has a primary winding formed from a copper via plated on the ferrite. Each element's secondary is another copper via plated over an insulating layer formed over the first layer of copper. The elements' primaries are interconnected on the first copper layer and the elements' secondaries are interconnected on the second copper layer. The configuration and turns ratio of the transformer are determined by the series and or parallel interconnections of the primary and secondaries. Some of the interconnections can be provided by the next higher assembly level through the circuit card, with the same magnetic device providing many turns ratio combinations or values of inductors.

REFERENCES:
patent: 2910662 (1959-10-01), Rex
patent: 3058078 (1962-10-01), Hoh
patent: 3273134 (1966-09-01), Lemaire et al.
patent: 3765082 (1973-10-01), Zyetz
patent: 3833872 (1974-09-01), Marcus et al.
patent: 3848210 (1974-11-01), Felkner
patent: 3898595 (1975-08-01), Launt
patent: 4758808 (1988-07-01), Sasaki et al.
patent: 4803453 (1989-02-01), Tomono et al.
IBM Technical Disclosure Bulletin, B. W. Styles, "Printed Circuit Coil," vol. 15, No. 1 Jun. 1972, p. 19.

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