Patent ID: 8421575
Filing Date: 2013-04-16
Classification: H01F

Abstract:
1. A multi-layered circuit structure, comprising: a first planar substrate layer having a first surface on which a first set of two or more spiral inductors is situated, wherein each of the spiral inductors in the first set of spiral inductors has a center portion and a tail portion, and wherein at least some of the spiral inductors in the first set of spiral inductors are electrically coupled to each other or to one or more other circuit components to form at least a portion of a circuit; a second planar substrate layer having a second surface on which a second set of two or more spiral inductors is situated, wherein each of the spiral inductors in the second set of spiral inductors has a center portion and a tail portion, wherein each spiral inductor in the second set of spiral inductors has a corresponding spiral inductor in the first set of spiral inductors, and wherein the second substrate layer is positioned relative to the first substrate layer such that: (a) the second substrate layer is substantially parallel with the first substrate layer; and (b) each spiral inductor in the second set of spiral inductors is substantially aligned with a corresponding spiral inductor in the first set of spiral inductors; a first coupling structure electrically coupling the center portion of a particular spiral inductor in the second set of spiral inductors to the center portion of a spiral inductor in the first set of spiral inductors that corresponds to the particular spiral inductor; a second coupling structure electrically coupling the tail portion of the particular spiral inductor in the second set of spiral inductors to the tail portion of the spiral inductor in the first set of spiral inductors that corresponds to the particular spiral inductor; a third coupling structure electrically coupling the center portion of a certain spiral inductor in the second set of spiral inductors to the center portion of a spiral inductor in the first set of spiral inductors that corresponds to the certain spiral inductor; and a fourth coupling structure electrically coupling the tail portion of the certain spiral inductor in the second set of spiral inductors to the tail portion of the spiral inductor in the first set of spiral inductors that corresponds to the certain spiral inductor; wherein there is no intervening substrate layer between the first planar substrate layer and the second planar substrate layer; and wherein at least a substantial portion of the first surface of the first substrate layer that is within proximity of the first set of spiral inductors is covered with a conductive material, which acts as a ground return for electromagnetic fields generated by the first set of spiral inductors.