Patent ID: 9156676
Filing Date: 2015-10-13
Classification: B81B,G01L

Abstract:
1. A method of fabricating a sensor with a diaphragm, the method comprising: creating a cavity in a first side of a first wafer, the first wafer having the first side and a second opposing side, the cavity defining a cavity edge adjacent the first side of the first wafer; bonding a second wafer relative to the first side of the first wafer to form a diaphragm that extends over the cavity, the diaphragm having a perimeter that is defined by the cavity edge of the cavity; supporting one or more sense elements on the diaphragm; and forming a trench along a path that extends around the diaphragm, the trench covering at least 70 percent of the path and is at least partially filled with a material that has a thermal conductivity that is less than the thermal conductivity of the second wafer.