Stealth aircraft can be stealthy mainly by using a series of stealth high and new technologies, including stealth materials for body skeleton and skin, surface stealth coating materials, shape stealth structure, infrared radiation reduction technology, noise reduction technology and electronic interference technology, etc. There are several kinds of stealth materials for making stealth aircraft skeleton and skin, the most commonly used are carbon fiber reinforced resin composites, carbon fiber and carbon matrix carbon-carbon composites, silicon carbide wire reinforced aluminum composites and so on. these composites are light in weight and can absorb radar waves. In the skin of the American B-2 stealth bomber, a honeycomb sandwich material is also used as a lining to further improve the ability of the body to absorb radar waves. In order to obtain the perfect double insurance effect, the outer surface of the whole fuselage is also coated with a layer of nickel-cobalt ferrite or a stealth coating composed of metal and metal oxide ultra-fine powder. This kind of coating can increase the magnetic loss of irradiated radar waves and play the role of absorbing and transmitting waves.
 Reveal the invisible material that makes the aircraft invisible is the best option for heading this text.