Infrared sights for future soldier systems in several European countries are moving ahead rapidly after initially being delayed due to the lack of available uncooled focal plane arrays.
SELEX Sensors & Airborne Systems is moving ahead in the UK’s Albion program for the development of 3rd Gen FPAs based on mercury cadmium telluride (MCT) FPAs grown by MOVPE (Metal Organic Vapor Phase Epitaxy). After experimenting with both GaAs and GaAs:Si (GaAs on silicon) substrates, researchers have settled on the GaAs substrates because of the lower defect levels and the better stability of defect levels at storage temperatures to 100ºC.