The Carlyle Group and Unison Capital Group have agreed to sell Covalent Materials, a manufacturer of engineered ceramics for semiconductors, to CoorsTek. Expected to close on December 26, the deal is reportedly worth more than ¥50 billion ($421 million). The combined entity, with roughly $1.25 billion in annual revenue, will have about 6,000 employees operating 50 production facilities across 14 countries. CoorsTek and Covalent serve over 10,000 technology and manufacturing customers across all major industrial markets. KPMG Corporate Finance is serving as the investment bank for CoorsTek. Formerly Toshiba Ceramics, Covalent was acquired by Carlyle and Unison Capital in 2006 for about $775 million.