First and second orders temperature-compensated resonator
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United States of America Patent
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May 13, 2014
Grant Date -
Dec 15, 2011
app pub date -
Jun 9, 2011
filing date -
Jun 10, 2010
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Abstract
A temperature-compensated resonator includes a body used in deformation, wherein the core (58, 58′, 18) of the body (3, 5, 7, 15, 23, 25, 27, 33, 35, 37, 43, 45, 47) is formed from a plate formed at a cut angle (θ′) in a quartz crystal determining the first and second orders temperature coefficients (α, β, α′, β′). According to the invention, the body (3, 5, 7, 15, 23, 25, 27, 33, 35, 37, 43, 45, 47) includes a coating (52, 54, 56, 52′, 54′, 56′, 16) deposited at least partially on the core (58, 58′, 18) and having first and second orders Young's modulus variations (CTE1, CTE2, CTE1′, CTE2′) according to temperature of opposite signs respectively to the first and second orders temperature coefficients (α, β, α′, β′) of the resonator so as to render compensated first and second orders temperature coefficients substantially zero.
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