BTU International, Inc. (BTU) is a global supplier of advanced thermal processing equipment to the alternative energy and electronics manufacturing markets. BTU equipment is used in the production of solar cells and nuclear fuel, as well as in printed circuit board assembly and semiconductor packaging. In the solar market, BTU offers processing equipment for both silicon and thin film photovoltaics. Also in the customers use the thermal systems for the processing of nuclear fuels. The convection solder reflow systems are used to attach electronic components to the printed circuit boards. In the semiconductor market, BTU participates in both wafer level and die level packaging, where the thermal processing systems are used to connect and seal integrated circuits into a package.