While a member of the Advanced Circuits Group, General Electric Company, from 1951–1960, he co-authored the first books in the world on transistor circuits and transistor circuit engineering He was a manager of the Components Group at the Philco Corporation from 1960-1963. During this time, as Chairman of the IRE Standards on Graphical symbols,Task Group 28.4.8, he was instrumental in obtaining international adoption of the US-derived graphical symbol for Transistors and other Semiconductor devices. He joined Rensselaer Polytechnic Institute in 1963 as a Professor of Electrophysics, and was Chairman from 1967-1974. He retired from RPI in 1992. At RPI, he introduced microelectronics into the graduate studies curriculum and wrote a book on this subject. This was the first book in the world to elucidate the necessary background required for an engineer to participate in the semiconductor industry. In addition to basic semiconductor physics, it covered topics such as Crystal Growth, Phase Diagrams, Diffusion, Oxidation, Epitaxy, Etching and Photolithography, which were not typical of the background of electrical engineers. Subsequently, this was followed by a book on semiconductor power devices, in which he presented a comprehensive theory for second breakdown. Following the work of Manasevit in 1968, he started the first university program on the OMVPE of compound semiconductors in 1970, and conducted research with his students in this area until retirement. This technology has become increasingly popular, and is now used in most modern optical devices such as lasers and light emitting diodes, transmitters and receivers for fiber optic communications and improved thermoelectric structures. His research in OMVPE included the growth and characterization of GaAs, InAs, GaInAs, InP, CdTe, HgCdTe and ZnSe materials and devices, which resulted in over 180 papers. Many of these were "firsts" in the field: the growth of GaInAs over the full range of compositions, the use of homostructures for evaluating recombination in surface-free GaAs, the use of halogen etching in GaAs, the OMVPE growth of large area films of HgCdTe with highly uniform composition and the p-type doping of this HgCdTe. Concurrent with his research activities, he also wrote two books on VLSI fabrication principles which included a comprehensive, unified treatment of Silicon and GaAs materials technology. and a These covered, for the first time, topics relevant to Compound Semiconductors, which are increasingly playing an important role in advanced semiconductor electro-optical and communication devices and systems.
