SOUTH PORTLAND, Maine, May 31 -- Fairchild Semiconductor International has finalized its acquisition of QT Optoelectronics, Inc. (QTO). QTO agreed to sell for $97.8 million, of which 12.5 percent will be paid in cash and the rest in Fairchild stock. QTO will become a wholly owned subsidiary of Fairchild and will be known as QT Optoelectronics, a Fairchild company.QTO comprises three product lines: optocouplers, LED lamps and displays and infrared components. Together, the lines produce over 750 components and employ approximately 1500 people around the globe. While QTO runs engineering and product marketing operations in Sunnyvale Calif., its main engineering and manufacturing operations are in Kuala Lumpur, Malaysia, and Wuxi, China. It also operates a wafer fabrication and die preparation facility in Singapore.