The objective of this thesis is the development of a process flow PZT-based of a piezoelectric Micromachined Ultrasound Transducer (pMUT) for large area applications, and subsequently the characterization of the PZT layer and the full device. A brief introduction and a theoretical background is developed in order to have a better understanding of the following experiments. A simple lumped element model is explained and the main process flow is discussed, giving a general idea of the steps. Then, the development of the process is treated, showing some results related to this exotic ferroelectric material, such as the development of a PZT etching process and a Critical Dimension (CD) of 10 um for the patterning of it.