Patent ID: 7028552
Filing Date: 2006-04-18
Classification: G01L

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