GT Advanced Technologies Inc. is diversified technology company with crystal growth equipment and solutions for the global solar, light emitting diode (LED) and electronics industries. The Company operates in three segments: its polysilicon business, its photovoltaic (PV), business and its sapphire business. The Company's principal products are Silicon Deposition Reactors (SDR) and related equipment used to produce polysilicon, the key raw material used in silicon-based solar wafers and cells; Advanced sapphire crystallization furnaces (ASF) which are used to crystallize sapphire boules, and Directional solidification (DSS) furnaces and related equipment used to cast multicrystalline and MonoCast crystalline silicon ingots. On January 7, 2013, the Company announced the idling of its HiCz pilot manufacturing facility in Hazelwood, Missouri. In May 2013, the Company acquired the business of Thermal Technology LLC.