Patent ID: 7420452

Claim:
An inductor structure, disposed over a substrate; the inductor structure comprising: a first spiral coil, having a first end and a second end, wherein the second end rotates in spiral fashion towards the inner portion of the first spiral coil and the first spiral coil comprises: a plurality of first conducting wires; and a first connection lead, connecting two adjacent first conducting wires; a second spiral coil, symmetrically to the first spiral coil disposed about a plane of symmetry and having a third end and a fourth end, wherein the fourth end rotates in spiral fashion towards the inner portion of the second spiral coil and connected to the second end of the first spiral coil to form a spiral coil structure with 2N turns, wherein N is a positive integral, and the second spiral coil comprises: a plurality of second conducting wires; and a second connection lead, connecting two adjacent second conducting wires, wherein the first connection lead and the second connection lead are interlaced with each other on the plane of symmetry and spaced from the substrate by different heights to form 2N−1 interlaced zones; and at least a gain pattern, disposed under the first connection lead at the (2N−1) th interlaced zone counted from the most-outer turn up and electrically connected to the corresponding first connection lead.