Patent ID: 9071223
Filing Date: 2015-06-30
Classification: G04B,H01L,H03H

Abstract:
1. A temperature compensated resonator including a body used in deformation, the core of the body including a first material, wherein the body has at least a first and second coating respectively made of second and third materials, the variations of Young's modulus with temperature being different for each material, each thickness of said at least first and second coatings being adjusted to allow said resonator to have substantially zero first and second order frequency variations with temperature, wherein the body further includes a third coating made of a fourth material whose variations of Young's modulus with temperature are different from the materials of the core and the first and second coatings, each thickness of the first, second, and third coatings being adjusted to allow the resonator to have substantially zero first, second, and third order frequency variations with temperature.