Rubicon Technology, Inc. develops, manufactures, and sells monocrystalline sapphire and other crystalline products for light-emitting diodes, radio frequency integrated circuits, blue laser diodes, optoelectronics, and other optical applications. It fabricates its products from the boules and sells them in various categories, including core, as-cut, as-ground, and polished. The company manufactures sapphire substrates and optical windows, such as two to four inch sapphire cores and wafers for use in LEDs and blue laser diodes for solid state lighting and electronic applications. It also offers six inch sapphire wafers that are used for Silicon-on-Sapphire RFICs, as well as products for military, aerospace, sensor, and other applications; and eight inch wafers to LED chip manufacturers. In addition, the company provides optically-polished windows and ground window blanks of sapphire and various fluoride compounds, such as calcium, barium, and magnesium fluoride. It provides its products to wafer polishing companies and semiconductor device manufacturers in Asia, North America, and Europe. The company was incorporated in 2001 and is based in Franklin Park, Illinois.