Patent ID: 7847666

Claim:
An inductor device in an integrated circuit having a first, a second, a third and a fourth metallization level, the inductor device including: a first winding portion; a second winding portion; a first bridge portion electrically the first winding portion to the second winding portion; a third winding portion; and a second bridge portion electrically connecting the second winding portion to the third winding portion; wherein the first winding portion and the second winding portion are substantially concentric in a plan view such that the first winding portion is substantially completely surrounded in the plan view by the second winding portion; wherein the second winding portion and the third winding portion are substantially concentric in the plan view such that the second winding portion is substantially completely surrounded in the plan view by the third winding portion; wherein each winding portion comprises a first metal line formed on the first metallization level and a second metal line formed on the second metallization level, the first metal line of a given winding portion being connected in parallel with the second metal line of the given winding portion; and wherein each bridge portion comprises a first metal line formed on the third metallization level and a second metal line formed on the fourth metallization level, the first metal line of a given bridge portion being connected in parallel with the second metal line of the given bridge portion.