Browse Prior Art Database

Flexible Circuit Solenoid

IP.com Disclosure Number: IPCOM000080835D
Original Publication Date: 1974-Feb-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Gonnella, NT: AUTHOR [+2]

Abstract

Flexible circuitry such as a composite of electrical paths which have been bonded to or sandwiched between plastic films may be used to form solenoid or transformer windings, provided the overall thickness of the composite film is such as to permit sharp bends.

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Flexible Circuit Solenoid

Flexible circuitry such as a composite of electrical paths which have been bonded to or sandwiched between plastic films may be used to form solenoid or transformer windings, provided the overall thickness of the composite film is such as to permit sharp bends.

To facilitate the required unidirectional current flow around the core while presenting both terminals of the winding at the outer periphery, the flexible circuit is formed as shown in the figure. The flexible circuit center section 2 is placed against core 3 with the conductor paths facing away from the core. Circuit portion 4 is wrapped around core 3, as indicated by arrow A, and circuit portion 5 is wrapped about core 3 in the opposite direction, as indicated by arrow B.

At the end of the wrapping operation, the offset terminal end 6 of circuit portion 5 crosses back into the path of circuit portion 4 enabling conductor end 7 to be soldered to conductor end 8. The pads 9 and 10 form the terminals of the winding, while the lengths of circuit portions 4 and 5 determine the number of turns in the winding.

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