Ingots are silicon precursors for chip production or the manufacture of solar cells. They are the silicon blocks or silicon cylinders that come from the silicon melt and from which the wafers
are cut. In terms of shape, ingots can be round silicon rods or cylinders, but also square ingots. Ingots consist of monocrystalline or polycrystalline silicon and are doped with dopants such as boron, phosphorus, antimony or arsenic
. The ingot length is between 50 cm and 1 m, with diameters up to 45 cm. Polycrystalline silicon can also be silicon ingots. For the production of wafers, the ingots are cut into thin slices with diamond saws.