Patent ID: 10352802

Abstract:
A pressure sensor chip according to the present invention includes two static-pressure diaphragms (2, 3) formed by dividing an annular diaphragm arranged so as to surround a differential-pressure diaphragm (1). A reference pressure is applied to one surface of one static-pressure diaphragm (2), and a measurement pressure (Pa) for one surface of the differential-pressure diaphragm (1) is transmitted to the other surface of the static-pressure diaphragm (2) along a branched path. A reference pressure is applied to one surface of the other static-pressure diaphragm (3), and a measurement pressure (Pb) for the other surface of the differential-pressure diaphragm (1) is transmitted to the other surface of the static-pressure diaphragm (3) along a branched path. Accordingly, multiple differential-pressure measurement ranges can be provided.