Patent ID: 7088215
Filing Date: 2006-08-08
Classification: H01F,H05K,Y10T

Abstract:
1. A compact inductor structure in two coplanar layers of a circuit board, the inductor structure comprising: a dielectric substrate having upper and lower faces; a first set of parallel conductive traces formed on the upper face of the substrate in a first plane; a second set of parallel conductive traces formed on the lower face of the substrate in a second plane; a plurality of metallized vias extending through the substrate and interconnecting the first and second sets of conductive traces to form a continuous spiral path with inductive properties; the first and second sets of parallel conductive traces are arranged in two adjacent ranks wherein the first set of traces in one rank is coplanar with the first set of traces in the other rank, and the second set of traces in one rank is coplanar with the second set of traces in the other rank so that the first and second sets of traces for both of the two ranks are contained in the same two parallel planes.