Patent ID: 8409901

Claim:
A method comprising: providing a first substrate comprising: a silicon wafer; at least one feed-through through a thickness of the first substrate from a first surface to a second surface providing electrical interconnection by way of the at least one feed-through from the first surface to the second surface, the at least one feed-through comprising: an electrically conductive material covering a predetermined region of the sidewall of the at least one feed-through; and a second non-conductive material filling the remaining interior region of the at least one feed-through to a predetermined depth from the second surface to the first surface and having a maximum temperature exposure to the substrate during manufacturing of at least one of 250° C. and 350° C.; and at least one microelectromechanical systems (MEMS) device directly onto the second surface of the first substrate and electrically connected to the at least one feed-through; providing a second substrate comprising: a borosilicate wafer; and at least one recess dimensioned so as to accept the at least one MEMS device fabricated on the first substrate; pre-processing the first and second substrates by: removing silicon oxide from first predetermined regions of the first substrate to be bonded to the second substrate by a dry etching process; exposing second predetermined regions of the second substrate to be bonded to the first substrate to a chemical process to create silanol bonds on said second predetermined regions of the second substrate; positioning the second substrate with respect to the first substrate such that the at least one MEMS device is thereby contained within a cavity formed by the first substrate and the at least one recess; and bonding the second substrate and first substrate together by forming silicon-oxygen-silicon bonds via an evaporation process utilizing a pressure annealing sequence.