Patent ID: 8397579
Filing Date: 2013-03-19
Classification: F02B,F02D,G01K,G01L,G01M,Y10T

Abstract:
1. A sensing device comprising: a planar substrate characterized by a plane; a beam formed on the substrate, the beam being capable of deflecting in the plane of the substrate into a cavity of the substrate in response to different pressures applied to the beam, wherein the beam deflects according to a difference between a first pressure on a first side of the beam inside the cavity and second pressure on a second side of the beam outside the cavity in a space outside the sensing device; and a piezo-resistive sensing element coupled to the beam, wherein the piezo-resistive sensing element detects beam deflection responsive to a gas flow outside the cavity adjacent the second side and generates an electrical signal as a function of beam deflection; wherein the sensing device has a thickness of less than about 100 μm.