Sensor.

摘要

A solid state transducer comprises a FET with a layer (3) of an elastomeric dielectric material between the gate electrode (4) and the gate insulator (2). The layer (3) allows a change in the spacing of the gate electrode and the gate insulator, in response to pressure applied to the device, resulting in a detectable change in their capacitance. The transducer may be used in a sensor (10) suitable for use in article-handling machinery. The sensor includes array of transducers and control circuits to process information signals derived by the transducers.