Patent ID: 7936245

Claim:
A structure of a spiral inductor, comprising: a first metal layer, comprising: a first segment; a second segment; and a third segment, connected to the first segment, wherein a layout direction of the third segment is different from a layout direction of the first segment and a layout direction of the second segment; a second metal layer, being positioned under the first metal layer, the second metal layer comprising: a fourth segment; a fifth segment; and a sixth segment, connected to the fifth segment, wherein a layout direction of the sixth segment is different from a layout direction of the fourth segment and a layout direction of the fifth segment; a first set of vias, for connecting the first segment with the fourth segment; and a second set of vias, for connecting the second segment with the fifth segment; wherein the first segment, the fourth segment and the first set of vias construct a first shunt winding; the second segment, the fifth segment and the second set of vias construct a second shunt winding; and the third segment and the sixth segment construct a crossover region.