The CPU pin is copper as the main raw material, and then a layer of pure gold. Because, as a CPU pin, must have good electrical conductivity and easy processing, can not be too expensive, so copper is the first choice. However, copper has a fatal injury: it is too active and easy to be oxidized, so it is necessary to plate a layer of inactive metal, so choose gold with excellent electrical properties.
cpu pins are the interface type, and the CPU needs to be connected to the motherboard through an interface in order to work. After so many years of development of CPU, the interface methods used are pin type, card type, contact type, pin type, etc.