In recent years, the process of China’s industrial modernization and the continuous rapid growth of the electronic information industry have driven the rapid rise of the sensor market. Temperature sensors as an important class of sensors, accounting for more than 40% of the total sensor demand. The temperature sensor utilizes the characteristics of the resistance of the NTC as a function of temperature, and non-electrical physical quantities are converted into electrical quantities so that accurate temperature measurement and automatic control of the semiconductor device can be performed. The temperature sensor has a wide range of applications, and can be widely used in color TV, temperature measurement and control, temperature compensation, flow velocity, flow rate and wind speed measurement, liquid level indication, temperature measurement, UV and infrared light measurement, microwave power measurement, etc. Computer color display, switching power supply, water heaters, refrigerators, kitchen equipment, air conditioning, automotive and other fields. In recent years, the rapid growth of the automotive electronics and consumer electronics industry has driven the rapid increase in demand for temperature sensors in China.