Patent ID: 7037800

Claim:
A method of fabricating a high frequency device, comprising the steps of: a) providing a first wafer, including the steps of: a1) forming a via hole in the first wafer; a2) forming an insulating layer on the first wafer having the via hole; a3) forming a plurality of first trenches and second trenches in the insulating layer by patterning the insulating layer, wherein the second trenches connect to the via hole; a4) forming an inductor by filling conductive material in the first trenches and forming via contact plugs by filling the conductive material in the second trenches; and a5) exposing a bottom region of the via contact plug by grinding a back side of the first wafer; b) providing a second wafer, including the steps of: b1) forming logic devices on the second wafer; and b2) forming a inductor connection lines on the second wafer; and c) bonding the first wafer and the second wafer, wherein the via contact plugs and the inductor interconnection lines are connected to each other.