IntelliEPI Inc. (Cayman), through its subsidiaries, produces and sells compound semiconductor epitaxy wafers for wireless communications, data transmission, and national defense. It uses proprietary real-time in situ growth monitoring on molecular beam epitaxy (MBE) systems to manufacture epi-wafers on gallium arsenide (GaAs) and indium phosphide (InP) substrates. Its products include GaAs-based pHEMTs and MHEMTs, InP-based HBTs, HEMTs, RTTs, and RTDs, Sb-based type II SLS photodetectors, GaAsSb-base InP HBTs, epi-ready GaSb substrates, mismatched epi products (III-V on Si, III-V on Ge, high In content InGaAs on Si), and optoelectronics such as avalanche photodiodes, lasers, optical receivers, quantum well infrared photodetectors, modulators, and quantum cascade lasers. The company also offers sales assistance, technical support, and semiconductor technical services. Founded in 1999, it is based in Richardson, Texas, and operates in the United States, Germany, Korea, Japan, China, and internationally.