MEMS device, assembly comprising the MEMS device, and method of operating the MEMS device

Proposed is a MEMS device comprising a layer stack having at least one second layer formed between a first layer and a third layer. A cavity is formed in the second layer. The MEMS device further comprises two laterally deflectable elements arranged laterally spaced apart in the cavity. Each of the two laterally deflectable elements comprises a respective end connected to a side wall of the cavity. Additionally, the MEMS device comprises a connecting element connected to the two laterally deflectable elements to couple the movement of the two laterally deflectable elements. A plurality of first fingers are arranged discretely spaced between the two laterally deflectable elements on the side wall of the cavity. Further, a plurality of second fingers are arranged discretely spaced between the two laterally deflectable elements on the connecting element. The plurality of second fingers interdigitate with the plurality of first fingers. Further, the plurality of second fingers are laterally displaceable relative to the plurality of first fingers upon deformation of the two laterally deflectable elements such that the plurality of first fingers and the plurality of second fingers define a plurality of volume variable sub-cavities within the cavity. Each of the plurality of sub-cavities is in contact with an ambient fluid of the MEMS device via a respective opening. In case of adjacent sub-cavities of the plurality of sub-cavities, the respective opening of one sub-cavity of the adjacent sub-cavities is formed in a different layer of the first layer, the second layer and the third layer than the opening of the other sub-cavity of the adjacent sub-cavities.