Patent ID: 8466769

Claim:
A multilayer inductor device comprising: a planar substrate including a plurality of dielectric layers; a ferrite body disposed in the substrate; an outer conductive coil helically wrapped around the ferrite body, the outer conductive coil including a first plurality of upper conductors disposed on a first upper dielectric layer of the substrate, a first plurality of lower conductors disposed on a first lower dielectric layer of the substrate, and a first plurality of conductive vias vertically extending through the substrate and conductively coupled with the first plurality of upper conductors and the first plurality of lower conductors; an inner conductive coil helically wrapped around the ferrite body, the inner conductive coil including a second plurality of upper conductors disposed on a second upper dielectric layer of the substrate, a second plurality of lower conductors disposed on a second lower dielectric layer of the substrate, and a second plurality of conductive vias vertically extending through the substrate and conductively coupled with the second plurality of upper conductors and the second plurality of lower conductors, wherein the inner conductive coil is disposed between the outer conductive coil and the ferrite body; and a flexible dielectric layer disposed on the substrate, the flexible dielectric layer including a planar slab of a ferrite material that extends over the outer conductive coil and the inner conductive coil.