Semiconductor sensor is a kind of sensor that uses the characteristics of semiconductor materials to detect physical quantities. It usually consists of a detector and a reading circuit made of semiconductor materials. When light, temperature, pressure, electric field and other physical quantities act on the detector, it will cause changes in the electrical properties of semiconductor materials, and then affect the current or voltage. These changes can be detected and measured by the reading circuit. Semiconductor sensors are widely used in various applications because of their high sensitivity, stability and low cost.