It is reported that demand for sapphire ingot becomes larger, even its demand exceeds supply, therefore its price soared in June, the average price rose from $ 3 per millimeter (mm) to $ 3.8 per mm, an growth of 20% just in a few weeks. The main applications of sapphire ingot are in the LED backlight and lighting over the past years, however, the TV market is bad, which causes that the overall demand for related LED supply chain is not strong; due to the good transmission of sapphire material, and scratch-resistant, wear-resistant, American smart phone manufacturers integrated...