Volume acoustic device and method for producing a volume acoustic device

A volume acoustic device, comprising

• a first electrode and a second electrode;
• a piezoelectric element disposed between the first electrode and the second electrode, wherein the piezoelectric element is configured such that a first electromagnetic signal fed into the first electrode is converted to an acoustic signal in the piezoelectric element and the acoustic signal is converted back into a second electromagnetic signal in the second electrode;
• a dielectric layer which surrounds the first electrode, the second electrode, and the piezoelectric element, and has a substantially planar surface;
• wherein at least one separation trench that at least partially surrounds the piezoelectric element is formed in the dielectric layer.

A method for producing a volume acoustic device, comprising the following steps:

• providing a substrate;
• configuring a first electrode, a second electrode, and a piezoelectric element disposed between the first electrode and the second electrode, on the substrate, wherein the piezoelectric element is configured such that a first electromagnetic signal fed into the first electrode is converted to an acoustic signal in the piezoelectric element, and the acoustic signal is converted back into a second electromagnetic signal in the second electrode;
• forming a dielectric layer which surrounds the first electrode, the second electrode, and the piezoelectric element, and has a substantially planar surface;
• and
• forming at least one separation trench in the dielectric layer that at least partially surrounds the piezoelectric element.