What is the most commonly used material in the manufacturing of semiconductors?

The most commonly used material in semiconductor manufacturing is monocrystalline silicon.

Silicon became dominant because it combines useful electronic properties with abundant raw material, relatively low cost, and the ability to form a high-quality insulating layer of silicon dioxide. That oxide is crucial to the metal-oxide-semiconductor processes used in modern integrated circuits.

For chip production, highly purified silicon is melted and formed into a single-crystal ingot, often called a boule. The boule is sliced into thin wafers, polished, and processed through repeated deposition, photolithography, etching, and doping steps. The single-crystal structure allows electrical behavior to be controlled consistently across the wafer.

Other semiconductor materials are important for specialized uses. Gallium arsenide is used in some high-frequency and optoelectronic devices, while silicon carbide and gallium nitride are valuable in power electronics. These alternatives do not displace silicon as the standard material for mainstream computer and memory chips.