The infrared focal plane array (IRFPA) device is a new generation of infrared detectors formed by introducing CCD technology into the infrared band. It is the key device of modern infrared imaging systems and is widely used in infrared imaging, infrared search and tracking systems, missile finder, Aerial surveillance and infrared countermeasures. IRFPA is based on materials, detector arrays, microelectronics, interconnects, packaging and many other technologies.