Patent ID: 8325002
Filing Date: 2012-12-04
Classification: H01F,H05K

Abstract:
1. A power inductor structure, comprising: a package substrate having a first metal layer and a second metal layer respectively disposed on a two opposite surfaces of the package substrate and a dielectirc core disposed between the first and second metal layers, wherein the first metal layer comprises a plurality of bond finger pairs, while the second metal layer comprises a plurality of conductive lines, each bond finger pair consists of two separate widen portions; a plurality of conductive vias, located within the package substrate and connecting the widen portions of the bond finger pairs and the plurality of the conductive lines, wherein the two widen portions of each bond finger pair is electrically connected through the conductive vias and one conductive line; a magnetic material block, located on the package substrate and between the widen portions, wherein the magnetic block is located on a top surface of the dielectric core and located above and surrounded by a ring-shaped slot concave into the dielectric core; and a plurality of wires, located over the package substrate and across the magnetic material block, and electrically connecting the plurality of the bond finger pairs.