![]() Pierce as a contraction of the term transresistance. The term transistor was coined by John R. Solid State Physics Group leader William Shockley saw the potential in this, and over the next few months worked to greatly expand the knowledge of semiconductors. įrom November 17, 1947, to December 23, 1947, John Bardeen and Walter Brattain at AT&T's Bell Labs in Murray Hill, New Jersey, performed experiments and observed that when two gold point contacts were applied to a crystal of germanium, a signal was produced with the output power greater than the input. In 1934, German inventor Oskar Heil patented a similar device in Europe. Because the production of high-quality semiconductor materials was still decades away, Lilienfeld's solid-state amplifier ideas would not have found practical use in the 1920s and 1930s, even if such a device had been built. However, Lilienfeld did not publish any research articles about his devices nor did his patents cite any specific examples of a working prototype. Lilienfeld also filed identical patents in the United States in 19. Physicist Julius Edgar Lilienfeld filed a patent for a field-effect transistor (FET) in Canada in 1925, which was intended to be a solid-state replacement for the triode. In 1909 physicist William Eccles discovered the crystal diode oscillator. The triode, however, was a fragile device that consumed a substantial amount of power. The thermionictriode, a vacuum tube invented in 1907, enabled amplified radio technology and long-distance telephony. ![]()
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