Patent ID: 8426233

Claim:
A method of forming a packaged microelectromechanical resonator, comprising: forming a first isolation trench in a first surface of a capping substrate, said first isolation trench encircling a first portion of the capping substrate; filling the first isolation trench with an electrically insulating material; bonding the first surface of the capping substrate to a device substrate comprising the microelectromechanical resonator and at least a first electrically conductive line connected to the microelectromechanical resonator; selectively etching through the first portion of the capping substrate to thereby define a through-substrate opening therein that exposes a first portion of the first electrically conductive line; and filling at least a portion of the through-substrate opening with an electrically conductive through-substrate via that is electrically connected to the first portion of the first electrically conductive line.