Patent ID: 11924610
Assignee: USOUND GMBH
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 10:
11. A MEMS sound transducer for generating and/or detecting sound waves in the audible wavelength range and/or in the ultrasonic range, the MEMS sound transducer comprising:
a support substrate extending generally in a plane disposed normal to a stroke axis;
a dam arrangement formed on the support substrate, wherein the dam arrangement is configured to extend away from the support substrate over a first distance measured along the stroke axis and configured to define a receiving space within the dam arrangement;
multiple piezoelectric elements disposed within the receiving space of the dam arrangement so that the multiple piezoelectric elements are completely bordered by the dam arrangement, wherein each of the piezoelectric elements is defined by a base element at a first end of each piezoelectric element and a cantilever arm defined at a second end of each piezoelectric element opposite the first end, wherein each of the base elements of the multiple piezoelectric elements is arranged on the support substrate and is formed to extend away from the support substrate over a second distance measured along the stroke axis, wherein each respective cantilever arm is connected at a first end to each respective base element so that a second end of the respective cantilever arm disposed opposite the first end and extending in a direction generally normal to the stroke axis can oscillate in the direction of the stroke axis, wherein the multiple piezoelectric elements are arranged on the support substrate in such a way that the respective second ends of the cantilever arms of the multiple piezoelectric elements meet in a center, wherein each of the cantilever arms is disposed at a third distance measured in a direction along the stroke axis from the support substrate; and
a diaphragm that covers the multiple piezoelectric elements, wherein the diaphragm is composed of a cured polymer, which forms the diaphragm after curing, and wherein the diaphragm is disposed around the multiple piezoelectric elements.