Raw materialSilicon, the chemical element symbol is Si. It is to the second most abundant element in the earth. Silicon is mostly found in silica sand or silica stone, but there is silicon in natural water, trees, plants and so on. The chemical symbol is SiO2. In nature, because it is combined with other substances, it needs to be refined.
Metal SiliconMetal silicon is also known as crystalline silicon or industrial silicon. Metal silicon is a product made by smelting silicon ore and coke in high temperature furnace. The purity of crystalline silicon is about 98%, and the other impurities are iron, aluminum and calcium.
IngotAfter removing oxygen at high temperature, high purity polycrystalline silicon is knocked down and put into a quartz crucible, heated and melted. A small seed rod hoisted by a cable lowered down to the melt surface and then it rotates and pulls up slowly. Finally, a single crystal silicon ingot is grown.
Silicon waferThe ingot is cut into 1mm wafers, and then a mirror-like smooth silicon wafer is manufactured by repeated grinding, polishing, etching, cleaning and other processes. The silicon wafer can be used to make semiconductor devices.
Semiconductor is a material whose conductivity is between conductor and insulator at room temperature. Semiconductor originally refers to semiconductor materials, but now it also includes integrated circuits (IC Chip) made of semiconductor materials. The surface of silicon wafer is made up of circuits with numerous transistors, which are used in computers, mobile phones, television, digital players, digital cameras, portable game player and so on. These are called semiconductor electronic devices. It can be seen that semiconductors have enriched our lives and changed our lives. But the driving force behind these things is the semiconductor.