User:AVandewerdt/George Castro

In 1965 George Castro (PhD), authored a doctrinal thesis at Dartmouth College that demonstrated that organic materials could conduct electricity when exposed to light. At that time this was a significant scientific achievement and led to an opportunity to conduct more research in this area at the California Institute of Technology in Pasadena in 1967. IBM hired him as a Research Staff Member in 1968 to help lead development into Organic PhotoConductors, a project he came to manage and which was key to IBM's development of both the Copier I and the IBM 3800. IBM needed this both to avoid patent infringement with Xerox (who used a photoconductor based on selenium) and to let them use plain paper in their Copiers. George Castro has been referred to as the inventor of the IBM Copier.