Patent ID: 6429755
Filing Date: 2002-08-06
Classification: H03H

Abstract:
A method for constructing an integrated circuit encapsulated resonator device of single crystal silicon formed on a silicon-on-insulator (SOI) substrate comprising the steps of:a) forming a top silicon layer, and an intermediate layer of SiO2 on said substrate; b) depositing a layer of SiO2 on the top silicon layer; c) opening a first mask and creating a conductive structure in said top silicon layer, said conductive structure having dimensions of a resonator device to be formed; d) opening a second mask and depositing a metal layer on top of said layer of SiO2 on the surface silicon layer in substantial alignment with said conductive structure and having dimensions corresponding to said resonator device; e) opening a third mask transverse to said conductive structure and said metal layer in said silicon surface layer to define a length of said resonator device, and etching first and second trenches at respective first and second sides of said metal layer and conductive structure down through the top SiO2 layer, the top silicon layer and, the intermediate layer of SiO2; f) opening a fourth mask corresponding in area to said third mask and forming a well structure by etching down to remove the SiO2 and the intermediate layer of SiO2 above and below said conductive structure; and, g) depositing SiO2 onto the structure commensurate in thickness to that of said well structure etched in step f) for filling said well on both said first and second sides of said conductive structure and said metal layer, wherein said conductive structure forms said encapsulated resonator device lying entirely within a vacuum in alignment with said top metal layer and operates by capacitively coupling an input signal provided at said metal layer to said resonator device.