摘要:
A mechanical resonator includes a spring-mass system, wherein the spring-mass system comprises a phase-change material. The mechanical resonator typically comprises an electrical circuit portion, coupled to the phase-change material to alter a phase configuration within the phase-change material. Methods of operation are also disclosed.
摘要:
A method for manufacturing microelectromechanical flexural resonators with a deforming element that has an elongate body extending along a spring axis. A deforming element is positioned on the semiconductor wafer with a defined nominal n-type doping concentration such that a crystal orientation angle is formed between the spring axis of the deforming element and a crystal axis of the silicon semiconductor wafer. The combination of the crystal orientation angle and the nominal n-type doping concentration is adjusted to a specific range, based on total frequency error of the deforming element in a broad temperature range. The combination is optimized to a range where also sensitivity to variations in the material properties is minimized.
摘要:
A resonator and a method of manufacturing a resonator are provided. The resonator includes a sacrificial layer formed on a substrate, and a resonant structure formed on the sacrificial layer, the resonant structure comprising a carbon nano-substance layer and a silicon carbide layer.
摘要:
A method for manufacturing microelectromechanical flexural resonators with a deforming element that has an elongate body extending along a spring axis. A deforming element is positioned on the semiconductor wafer with a defined nominal n-type doping concentration such that a crystal orientation angle is formed between the spring axis of the deforming element and a crystal axis of the silicon semiconductor wafer. The combination of the crystal orientation angle and the nominal n-type doping concentration is adjusted to a specific range, based on total frequency error of the deforming element in a broad temperature range. The combination is optimized to a range where also sensitivity to variations in the material properties is minimized.
摘要:
One embodiment of the present invention sets forth a method for decreasing a temperature coefficient of frequency (TCF) of a MEMS resonator. The method comprises lithographically defining slots in the MEMS resonator beams and filling the slots with oxide. By growing oxide within the slots, the amount of oxide growth on the outside surfaces of the MEMS resonator may be reduced. Furthermore, by situating the slots in the areas of large flexural stresses, the contribution of the embedded oxide to the overall TCF of the MEMS resonator is increased, and the total amount of oxide needed to decrease the overall TCF of the MEMS resonator to a particular target value is reduced. As a result, the TCF of the MEMS resonator may be reduced in a manner that is more effective relative to prior art approaches.
摘要:
One embodiment of the present invention sets forth a method for decreasing a temperature coefficient of frequency (TCF) of a MEMS resonator. The method comprises lithographically defining slots in the MEMS resonator beams and filling the slots with oxide. By growing oxide within the slots, the amount of oxide growth on the outside surfaces of the MEMS resonator may be reduced. Furthermore, by situating the slots in the areas of large flexural stresses, the contribution of the embedded oxide to the overall TCF of the MEMS resonator is increased, and the total amount of oxide needed to decrease the overall TCF of the MEMS resonator to a particular target value is reduced. As a result, the TCF of the MEMS resonator may be reduced in a manner that is more effective relative to prior art approaches.
摘要:
A mechanical resonator includes a spring-mass system, wherein the spring-mass system comprises a phase-change material. The mechanical resonator typically comprises an electrical circuit portion, coupled to the phase-change material to alter a phase configuration within the phase-change material. Methods of operation are also disclosed.
摘要:
A mechanical resonator includes a spring-mass system, wherein the spring-mass system comprises a phase-change material. The mechanical resonator typically comprises an electrical circuit portion, coupled to the phase-change material to alter a phase configuration within the phase-change material. Methods of operation are also disclosed.
摘要:
One embodiment of the present inventions sets forth a method for decreasing a temperature coefficient of frequency (TCF) of a MEMS resonator. The method comprises lithographically defining slots in the MEMS resonator beams and filling the slots with a compensating material (for example, an oxide) wherein the temperature coefficient of Young's Modulus (TCE) of the compensating material has a sign opposite to a TCE of the material of the resonating element.
摘要:
In accordance with one embodiment of the present disclosure, a semiconductor substrate includes complementary metal-oxide-semiconductor (CMOS) circuitry disposed outwardly from the semiconductor substrate. An electrode is disposed outwardly from the CMOS circuitry. The electrode is electrically coupled to the CMOS circuitry. A resonator is disposed outwardly from the electrode. The resonator is operable to oscillate at a resonance frequency in response to an electrostatic field propagated, at least in part, by the electrode.