Patent ID: 7806586

Claim:
An encapsulated resonator arrangement comprising: a substrate; at least two composite resonant structures, each structure extending over the substrate and including a structural material susceptible to temperature-related fluctuation in resonant frequency, the respective composite structures having different structural materials and exhibiting TCF (temperature coefficient of frequency) values that are different over a predetermined temperature range, and a compensation material grown on an outer surface of the structural material and having a TCE (temperature coefficient of Young's Modulus) and thickness, relative to the structural material, to passively mitigate the temperature-related fluctuation in resonant frequency in the composite structure; for each composite structure, a support structure coupling the composite structure to the substrate at a single location to solely support the composite structure extending over the substrate; sidewall material on the substrate and laterally adjacent the composite structures; and an encapsulation material over the composite resonant structures and, with the substrate and sidewall material, encapsulating the composite resonant structures.