Fairchild Semiconductor has appointed Brent Rowe as regional vice president of sales for its Americas region. Rowe will retain his responsibilities as vice president of sales for Europe.   . . .   Lambda Physik has launched an online interactive laser guide that enables customers to select a laser according to wavelength, energy and repetition rate, for its excimer, diode-pumped solid-state and dye lasers. Visit www.lambdaphysik.com.   . . .   Tekcore Co. Ltd., of Taiwan, a manufacturer of GaN-based light-emitting diode (LED) wafers, recently ordered two AIX 2600G3 HT reactors, both in 24- by 2-inch configuration, from AIXTRON, a manufacturer of MOCVD equipment for the production of compound semiconductors. The order follows the qualification in December of the company's first 24- by 2-inch large-scale reactor system. Tekcore’s product portfolio includes green, blue and ultraviolet UHB-LED wafers.