GT Crystal Systems commences lawsuit against ARC Energy for misappropriation of trade secrets

May 11, 2011
Date Announced: 11 May 2011 MERRIMACK, N.H. -- GT Solar International, Inc. (NASDAQ:SOLR - News) today announced that its subsidiaries, GT Crystal Systems, LLC and GT Solar Hong Kong, Limited have filed a lawsuit in the Hillsborough County Superior Court (Southern District) in New Hampshire against Advanced RenewableEnergy Company, LLC (“ARC”), Kedar Gupta, its Chief Executive Officer and Chandra Khattak, an ARC employee, for the misappropriation of trade secrets relating to sapphire crystallization processes and equipment. The complaint alleges that ARC and the named individuals misappropriated trade secrets relating to GT Crystal Systems’ technology for manufacturing sapphire crystals, as a means of entering the sapphire crystallization equipment business. The complaint further alleges civil conspiracy, unfair competition, breach of contract and interference with contractual relations. “We have an obligation to our shareholders to be diligent about protecting our intellectual property,” said Hoil Kim, GT Solar’s General Counsel. “When we believe our intellectual property has been compromised, we will take the necessary action to protect our rights.” About GT Solar International, Inc. GT Solar International, Inc. is a global provider of polysilicon production technology, and sapphire and silicon crystalline growth systems and materials for the solar, LED and other specialty markets. The company's products and services allow its customers to optimize their manufacturing environments and lower their cost of ownership.

Media: Jeff Nestel-Patt 603-204-2883 Investors/Analysts: Ryan Blair 603-681-3869 [email protected]

E-mail:[email protected]