Rubicon Technology, Inc., an electronic materials provider, develops, manufactures, and sells monocrystalline sapphire and other crystalline products for light-emitting diodes (LEDs), radio frequency integrated circuits (RFICs), optoelectronics, and other optical applications. The company’s products include two to six inch sapphire cores for use in LED applications and into components, such as lens covers for mobile devices; four and six-inch sapphire wafers that are used as substrates for the manufacture of LED chips, as well as for other semiconductor applications, including silicon-on-sapphire RFICs; four, six, and eight-inch patterned sapphire wafers, which are polished wafers to produce a patterned surface that enhances LED light extraction efficiency; and optical sapphire products that are used in equipment for a range of end markets comprising defense and aerospace, medical devices, oil and gas drilling, semiconductor manufacturing, and other markets. It also offers optically-polished windows and ground window blanks of sapphire. The company sells its products directly to semiconductor device manufacturers, and wafer polishing companies in Asia, Australia, North America, and Europe. Rubicon Technology, Inc. was incorporated in 2001 and is headquartered in Bensenville, Illinois.