Patent ID: 7642890

Claim:
An inductor structure, comprising: a first winding turn, disposed on a substrate; a second winding turn, disposed between the first winding turn and the substrate, wherein a cross section area of the second winding turn is greater than that of the first winding turn, and the first winding turn is projected on to the second winding turn; and a third winding turn, disposed between the first winding turn and the second winding turn, the third winding turn forms a three-dimensional winding turn structure having at least one turn above the substrate, and the third winding turn is projected onto the second winding turn, one end of the second winding turn is grounded, and the other end of the second winding turn and the three winding turn are electrically connected in series, the first winding turn and the second winding turn are electrically connected in series through the third winding turn, and the first winding turn, the second winding turn and the third winding turn form a three-dimensional helix structure above the substrate.