Already in the business with their solar-type thin film solar cells, which in July 2009 when LG announced the world’s most energy efficient (11.1 percent) in large-area (1.1 x 1.3 meters), but LG has announced today to have made another step forward in the Solar Business in their latest investment in production lines in Gumi, South Korea for the production of silicon wafers based on crystalline solar cells type.