Patent ID: 8387234

Claim:
A multi-turn coil device comprising: a. a flexible circuit board having a first side, and a second side on the opposite side of the flexible circuit board as the first side when the flexible circuit board; is unfolded b. a plurality of serially electrically coupled coils coupled to the flexible circuit board, each coil having a coil direction, and wherein the coils are positioned such that each coil substantially overlaps each of the other coils when the flexible circuit board is folded; and c. one or more conductive paths formed from the first side to the second side of the flexible circuit board, wherein one or more coils of the plurality of serially electrically coupled coils are coupled to the second side, and wherein at least one coil of the plurality of serially electrically coupled coils on the first side is electrically coupled to an opposing coil of the plurality of serially electrically coupled coils on the second side through the one or more conductive paths when the flexible circuit board is unfolded.