II-VI Inc. of Saxonburg, Pa., recently named its president, Francis J. Kramer, to succeed Carl J. Johnson as CEO, to be effective July 1. Johnson, who co-founded the company in 1971, will remain an executive of the company serving as chairman of the board. Kramer joined II-VI in 1983 as vice president and general manager of manufacturing. He was named executive vice president and general manager of manufacturing in 1984 and was promoted in 1985 to president and chief operating officer. He will continue to serve as president. II-VI is a developer of crystal growth technology used in industrial manufacturing, military and aerospace, medical radiology, high-power electronics and telecommunications and thermoelectronics applications. It makes crystalline compounds including zinc selenide for infrared laser optics, cadmium zinc telluride for gamma radiation detectors, silicon carbide for high-power electronic and microwave applications, and bismuth telluride for thermoelectric coolers.