A thermocouple is a critical sensor in the semiconductor industry, used to measure and control temperature in high-precision manufacturing processes. It ensures stable and accurate thermal conditions during operations like furnace heating, deposition, and etching, directly impacting product quality and consistency. By providing real-time temperature data, thermocouples help prevent overheating, material defects, and equipment damage. Their reliability and responsiveness make them indispensable for maintaining optimal performance and process control in semiconductor fabrication.