AXT, Inc. designs, develops, manufactures, and distributes compound and single element semiconductor substrates. The company manufactures its semiconductor substrates using its proprietary vertical gradient freeze technology. It offers semi-insulating substrates made from gallium with arsenic (GaAs), which are used for applications in power amplifiers and radio frequency integrated circuits for wireless handsets; direct broadcast televisions; transistors; and satellite communications. AXT, Inc. also provides semi-conducting substrates made from GaAs that have applications in light emitting diodes, lasers, and optical couplers; substrates made from indium with phosphorous, which are used in broadband and fiber optic communications; and substrates made from germanium that are used in satellite and terrestrial solar cells, and optical applications. In addition, the company, through its subsidiaries and joint ventures, manufactures and sells gallium, arsenic, germanium, germanium dioxide, pyrolytic boron nitride crucibles, and boron oxide. AXT, Inc. sells its products through direct sales force in the United States and Asia, as well as through independent sales representatives and distributors in Europe and other parts of Asia. The company was formerly known as American Xtal Technology, Inc. and changed its name to AXT, Inc. in July 2000. AXT, Inc. was founded in 1986 and is headquartered in Fremont, California.