Fig. 5: MUT categories and fabrication of LN pMUTs.

a Working principle of a cMUT and the main composition layers. b Working principle of a pMUT and the main composition layers. c Step-by-step fabrication process of the LN pMUTs.

a Working principle of a cMUT and the main composition layers. b Working principle of a pMUT and the main composition layers. c Step-by-step fabrication process of the LN pMUTs.