QUANTUMBYTES on Instagram: "A CPU begins as silicon, an element extracted from sand. Silicon is refined to extreme purity and grown into a single crystal, then sliced into thin discs called wafers. Pure silicon is chosen because it can be precisely controlled to act as either an insulator or a conductor. The wafer is processed using photolithography. Light shines through patterned masks to etch microscopic circuits onto the surface. Specific regions are doped with atoms like boron or phosphorus

Properties of Silicon and its uses