Teal 's group built the first grown - junction germanium transistors , which were announced by Shockley at a press conference on July 4 , 1951 .
Gordon Teal and technician Ernest Buehler did pioneering research on the growing and doping of semiconductor crystals between 1949 and 1952 .
Gordon Teal 's group built the first grown - junction germanium transistors , which were announced by Shockley at a press conference on July 4 , 1951 .
Gordon Teal and technician Ernest Buehler did pioneering research on the growing and doping of semiconductor crystals between 1949 and 1952 .