Siltronic AG, together with its subsidiaries, manufactures and sells hyperpure semiconductor silicon wafers with diameters of up to 300 mm worldwide. It offers polished and epitaxial wafers. The company also provides special products, such as Ultimate Silicon, an optimal crystal for polished wafers; PowerFZ, a wafer product based on the float zone method; and HIREF, a high reflective non-polished wafer product.