Patent ID: 7395718
Filing Date: 2008-07-08
Classification: G01L

Abstract:
1. A pressure transducer system comprising: a silicon plate having a reduced thickness area forming a diaphragm; a glass plate or ring overlying and bonded to the silicon plate and having an opening over the diaphragm, the silicon plate having an exposed extent beyond the glass plate or ring; resistive areas formed on the surface of the diaphragm, wherein radially extending resistive areas formed on the diaphragm increase resistance with deflection of the diaphragm, and resistive areas formed on the diaphragm perpendicular to the radially extending resistive areas reduce resistance or have little change in resistance with deflection of the diaphragm; conductive paths coupling wire bond pads on the exposed extent of the silicon plate and the resistive areas; and circuitry coupled to the wire bond pads for providing an output signal that varies with the pressure applied to the diaphragm.