The GaAs Field effect transistor and the GaAs monolithic ic were invented and developed at Caswell, but what is probably less well known is that scientists on the site were working on silicon integrated circuit(ic) technology almost 18 months before Jack Kilby demonstrated the first working ic at Texas Instruments in Dallas.
Tersoff showed that the experimentally measured phi bp fits his theoretical model for Au in contact with 10 common semiconductors, including Si, Ge, GaP, and GaAs.