This review collates around 100 papers that developed micro-electro-mechanical system (MEMS) capacitive microphones. As far as we know, this is the first comprehensive archive from academia on this versatile device from 1989 to 2019. These works are tabulated in term of intended application, fabrication method, material, dimension, and performances. This is followed by discussions on diaphragm, backplate and chamber, and performance parameters. This review is beneficial for those who are interested with the evolutions of this acoustic sensor.

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In this work, mechanical properties of an epitaxial silicon carbide-on-silicon (3C-SiC-on-Si) sample were extracted using a Micro Materials Nanotest® indentation system. Maximum load, penetration depth and loading rate were set at 25 mN, 550 nm and 5 mN s −1 , respectively. We first plot the load-depth curve of 3C-SiC film and Si substrate. Then, we find the maximum values of hardness, tensile modulus, shear strength, shear modulus and tensile stress of 3C-SiC film. The obtained data provide evidence of the suitability of this film to be applied as an electroacoustic transducer.