LED die manufacturers are stabilizing raw material sources in the wake of rising LED lighting demands, and competition from other sapphire substrate applications. Epistar has reached a Patterned Sapphire Substrate (PSS) production capacity agreement with Crystalwise and Rigidtech Microelectronics (Rigidtech), in which two PSS production lines from each company will be fully supporting Epistar. Due to PSS higher prices, it is estimated substrate manufacturers’ 3Q13 revenue will hit double digit growths.