Patent ID: 11879800
Assignee: ROSEMOUNT AEROSPACE INC.
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A microelectromechanical system (MEMS) strain gauge pressure sensor comprising:
a top wafer stack having a top surface and a first cavity that is configured to receive a first fluid at a first pressure;
a backing wafer having a bottom surface opposite the top surface of the top wafer stack;
a diaphragm wafer positioned between the top wafer stack and the backing wafer and having a second cavity that is configured to receive a second fluid at a second pressure, the diaphragm wafer comprising:
a diaphragm extending between the first cavity and the second cavity and configured to deflect from the first pressure and/or the second pressure; and
a resistor positioned on the diaphragm to sense a deflection of the diaphragm; and

a pedestal connected laterally to the top wafer stack, the backing wafer, and the diaphragm wafer;
wherein the MEMS strain gauge pressure sensor has a central axis that is parallel to the top surface and the bottom surface such that the MEMS strain gauge pressure sensor has mechanical symmetries about the central axis.