Wafer refers to a silicon wafer used in the fabrication of a silicon semiconductor integrated circuit. Since it has a round shape, it is called a wafer; on the silicon wafer, it can be processed into various circuit element structures and become a specific electrical function. IC products. The original material of the wafer is silicon, and the surface of the crust is inexhaustible silicon dioxide. Silica ore is refined through an electric arc furnace, chlorinated with hydrochloric acid, and distilled to produce high-purity polysilicon with a purity as high as 0.99999999999. The wafer fab then dissolves the polysilicon, then incorporates a small silicon crystal seed crystal in the melt, and then slowly pulls it out to form a cylindrical monocrystalline silicon crystal rod, since the silicon crystal rod is A small grain is gradually formed in the molten silicon raw material.
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