Hydro Aluminium High Purity GmbH, based in Grevenbroich, is a wholly owned subsidiary of Hydro Aluminium Deutschland GmbH in Grevenbroich, which performs a holding function within Germany. The object of the company is the production and sale of ultra-pure aluminum - low grade (purity > 99.99%) and high grade (purity > 99.999%). The main sales markets are the market for capacitor foil and high purity alumina applications as well as the market for semiconductors and flat panel displays.