MEMS piezoelectric resonator with novel supporting structure
A piezoelectric resonator and support structure technology, applied in the direction of electrical components, impedance networks, etc., can solve the problem of low Q value of MEMS resonators, achieve the effects of reducing energy dissipation, improving quality factor, and reducing anchor point loss
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[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0024] The present embodiment provides the MEMS piezoelectric resonator of novel supporting structure, and its result is as follows figure 1 , figure 2 , image 3 As shown, an SOI substrate is used, which is composed of a 400 μm polysilicon substrate, a 1 μm silicon dioxide insulating layer and a 10 μm monocrystalline silicon structure layer. Take the MEMS piezoelectric resonator in the transverse vibration mode as an example:
[0025] When the device is manufactured, first grow a layer of silicon dioxide insulating layer on the single crystal silicon, apply photoresist and photolithography, etch with hydrogen fluoride to form 8-1, 8-2, 9-1, 9-2, 10- 1, 10-2, 11-1, 11-2; then use reactive sputtering to obtain piezoelectric film, and then use wet etching to obtain shape 2; then use reactive sputtering to obtain metal film, etch to obtain in...
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