How did the F- 1 17 fighter achieve stealth?

Lockheed Martin of the United States began to implement the "Skunk Plan" in the mid-1970s, that is, secretly developed a "stealth" fighter-F-117. F- 1 17 has a strange appearance, and the wing and fuselage are integrated. The whole fuselage surface is almost composed of several facets, which can scatter radar waves at various angles and cannot form effective echoes. The fuselage is made of a large number of special materials and coated with stealth coatings, which makes F- 1 17 basically undetected by radar and infrared detection devices.

F- 1 17 was originally designed as a fighter-bomber, but because of its excellent stealth function, it is almost impossible for enemy planes to find it and conduct air combat with it, and its flight flexibility is not enough, so it is actually a tactical bomber for carrying out night bombing missions. During the American invasion of Panama and the bombing of Iraq in the Gulf War, the United States successfully used F- 1 17 to carry out bombing missions many times, but none of them were noticed by the other side.