Development of an ultrasonic sensor dedicated to odour analysis

Published : 26 March 2019

The development of Micromachined Ultrasonic Transducers (MUT) was first dedicated to acoustics for biomedical applications. Today, they are of great interest for a much wider spectrum of applications, such as fingerprint sensor and echolocalization, because of their unique properties compared to bulk transducers : size, ease of integration, potentially low cost.

The MEMS section of the CEA-LETI is devoted to MEMS design, fabrication and test. Current work include the development of innovative capacitive and piezoelectric micromachined transducer (cMUT / pMUT).

The candidate will join the MEMS sensor lab to investigate the potential of current cMUT sensor for gas and odour analysis. He/she will establish the relevance of current sensor by electrical and optical characterization (impedance analyzer, laser vibrometry, digital holography microscopy). Analytical model and numerical simulation will be developed to support the interpretation of the results. The candidate will be able to propose novel design for the next generation of gas / odour sensors. The fabrication process will be achieved within the 8 inches MEMS Platform of CEA-LETI with the strong support of the CEA teams. The characterization will confirm and refine the models. The relevance of the devices for the targeted applications (environmental or biomedical field) will be evaluated on a dedicated gas test setup, in collaboration with a start-up.

For this purpose, the Ph.D. student is expected to have strong background in mechanics. He will tackle both scientific and technological challenges. He should be an autonomous team player.

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