Acceleration sensor for integration in vehicle airbag system - has piezoelectric element on acceleration signal electrode on circuit board carrying hybrid IC signal processing circuit

摘要

The acceleration sensor has a piezoelectric element (2) and a circuit board (1) with an acceleration signal output electrode (6) and earth electrode (7) on its main surface. The piezoelectric element is attached to the acceleration signal output electrode, and a conducting element is attached to the earth electrode. A wt. piece (4) attached in the form of a bridge to the piezoelectric element and conducting element is electrically conducting at least in the regions in contact with the conducting element and piezoelectric element. The circuit board carries an acceleration signal processing circuit in the form of a hybrid IC. USE/ADVANTAGE - Vehicle airbag system. High shock resistance and high reliability.