Sumco Corp is a Japan-based company mainly engaged in the manufacture and sale of high-purity silicon. The Company operates the high-purity silicon business, which is mainly engaged in the manufacture and sale of silicon wafers to semiconductor manufacturers. Semiconductor silicon wafers are used as substrate materials by semiconductor manufacturers when manufacturing various semiconductors such as memory and logic. The Company manufactures polished wafers of various diameters and epitaxial wafers with further special processing on their surfaces. The Company operates in Japan, the United States, Taiwan, Singapore, South Korea and the United Kingdom and other regions.