MICROMECHANICAL PRESSURE SENSOR DEVICE AND CORRESPONDING MANUFACTURING METHOD

• Main Authors: Schmollngruber, Peter, Weber, Heribert
• Format: Patent
• Language: English
• Published: 15.07.2021
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICALDEVICES; MICROSTRUCTURAL TECHNOLOGY; PERFORMING OPERATIONS; PHYSICS; PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTUREOR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS; TESTING; TRANSPORTING

A micromechanical pressure sensor device and a corresponding manufacturing method. The micromechanical pressure sensor device is equipped with a sensor substrate; a diaphragm system that is anchored in the sensor substrate and that includes a first diaphragm and a second diaphragm situated spaced apart therefrom, which are circumferentially connected to one another in an edge area and enclose a reference pressure in an interior space formed in between; and a plate-shaped electrode that is suspended in the interior space and that is situated spaced apart from the first diaphragm and from the second diaphragm and forms a first capacitor with the first diaphragm and forms a second capacitor with the second diaphragm. The first diaphragm and the second diaphragm are designed in such a way that they are deformable toward one another when acted on by an external pressure.