Semiconductor transducer is a new type of semiconductor device, it can achieve electricity, light, temperature, sound, displacement, pressure and other physical quantities between the mutual conversion, and easy to achieve integration, multi-functional, more suitable for the requirements of the computer, so it is widely used in automated detection systems. Since the actual measurement is mostly non-electric, the main job of the sensor is to convert the non-electrical signal into an electrical signal. The main application areas of semiconductor transducer are industrial automation, telemetry, industrial robots, household appliances, environmental pollution monitoring, healthcare, medical engineering and bioengineering