Patent ID: 7166493

Claim:
A method of attaching two wafers, the method comprising: providing a first wafer having a first side and a second side; providing a second wafer having a first side and a second side; creating at least one pit into the first side of the second wafer to define at least two pillars, wherein the pit has a perimeter with perimeter walls, and the at least two pillars extend up from a bottom of the pit and are spaced inward from the perimeter walls of the pit; adapting at least one of the pillars to conduct an electrical signal by doping an area of the pillar; providing a contact pad on a first side of the first wafer; aligning the first wafer and the second wafer such that the at least one pillar that is adapted to conduct an electrical signal corresponds to the contact pad; attaching the first wafer to the second wafer, wherein an electronic component comprising an inductor is on the second wafer and electrically connected to the contact pad on the first wafer via at least one of the pillars.