Appeal No. 1998-1408 Page 3
Application No. 08/569,529
The inventive transformer comprises a PCB having
elongated conductors printed thereon, a ferrite core having a
bottom mounted on the PCB, and a flex circuit contoured around
a top and sides of the core. More specifically, the flex
circuit comprises a dielectric sheet and elongated conductors
printed on both faces thereof. The conductors of the flex
circuit are surface bonded to respective conductors of the PCB
to form a series of primary windings and a series of secondary
windings around the core. Providing the upper portions of
the windings by means of the flex circuit reduces the cost of
construction because it does not require handling of discrete
conductor portions.
Claim 1, which is representative for our purposes,
follows:
1. An electromagnetic device comprising:
a printed circuit board having elongated
conductors printed thereon;
a ferrite core having a bottom mounted onto said
printed circuit board; and
a flex circuit comprising a flexible dielectric
sheet and elongated conductors printed on said
sheet, said flex circuit being contoured around
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