Silicon's Applications: Chips Use Barely One Percent of It
Most silicon becomes aluminium alloys and silicones. Solar panels are the booming slice, and microchips, despite the name, use only about 1 percent.
We named an entire technological age after silicon chips, yet the application most people associate with the element is a rounding error in its actual demand.
Aluminium alloys
Silicon alloying addition in cast aluminium, covered on aluminium's materials science page, improving fluidity and wear resistance.
Silicones & chemicals
Sealants, lubricants, and a broad family of silicon-based polymer chemicals.
Polysilicon (mostly solar)
Solar-grade and electronic-grade material, covered on the materials science and mining pages, the fastest-growing category.
Within polysilicon, solar dwarfs semiconductors
Microchips need far less silicon by weight than a solar panel does, a single wafer’s silicon content is tiny relative to a panel’s, which is why semiconductor demand barely registers in silicon’s overall tonnage even though it is the application most people picture.
Sources: end-use shares reference this project’s own verified demand data (USGS Mineral Commodity Summaries 2025).