Patent ID: 8232845

Claim:
A packaged device, comprising: a base substrate having a first bonding pad and a peripheral pad provided thereon, the peripheral pad encompassing the first bonding pad; an acoustic resonator disposed on the base substrate; a cap substrate having a bonding pad seal and a peripheral pad seal provided thereon, the bonding pad seal bonding around the perimeter of the first bonding pad and the peripheral pad seal bonding with the peripheral pad to define a hermetically sealed volume between the cap substrate and the base substrate, the cap substrate defining a through hole therein positioned over the first bonding pad, the through hole providing access for an electrical connection to the first bonding pad; a material layer region provided on a portion of a first surface of the cap substrate within the hermetically sealed volume, wherein the material layer region comprises a material having a substantially lower resistivity than the cap substrate and is electrically isolated from the bonding pad seal; and electronic circuitry formed on the material layer region and electrically connected with the acoustic resonator.