Patent ID: 8443676
Filing Date: 2013-05-21
Classification: G01L

Abstract:
1. A pressure sensor with a diaphragm configured to be deflected or deformed as a result of pressurization, with an enclosed hollow volume disposed below the diaphragm, a supporting frame for the diaphragm which sealingly closes the periphery of the diaphragm relative to a base member, and with at least one pressure transducer which converts the deflection or deformation of the diaphragm into at least one electric quantity, the diaphragm further including a substantially non-deformed part carrying a reference electrode permitting a capacitive reference measurement in conjunction with a back plate electrode, the pressure sensor being sealingly encapsulated on all sides and having no electric contacts or lines leading to the outside, and at least one of the base member and the supporting frame being at least in part made of a of plastic or ceramic material and the diaphragm consisting of plastic or ceramic material.