Transistor
The transistor is the fundamental building block of modern electronic devices, and is ubiquitous in modern electronic systems. Julius Edgar Lilienfeld patented a field-effect transistor in 1926 but it was not possible to actually construct a working device at that time. The first practically implemented device was a point-contact transistor invented in 1947 by American physicists John Bardeen, Walter Brattain, and William Shockley. The transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things. The transistor is on the list of IEEE milestones in electronics, and Bardeen, Brattain, and Shockley shared the 1956 Nobel Prize in Physics for their achievement.
Nobel Prize controversies
The 1956 prize went to John Bardeen, Walter Houser Brattain and William Bradford Shockley "for their researches on semiconductors and their discovery of the transistor effect". However, the committee did not recognize numerous preceding patent applications. As early as 1928, Julius Edgar Lilienfeld patented several modern transistor types. In 1934, Oskar Heil patented a field-effect transistor. It is unclear whether Lilienfeld or Heil had built such devices, but they did cause later workers significant patent problems. Further, Herbert Mataré and Heinrich Welker, at Westinghouse Paris, applied for a patent in 1948 of an amplifier based on the minority carrier injection process. Mataré had first observed transconductance effects during the manufacture of germanium diodes for German radar equipment during World War II. Shockley was part of other controversies—including his position as a corporate director and his self-promotion efforts. Further, the original design Shockley presented to Brattain and Bardeen did not work. His share of the prize resulted from his development of the superior junction transistor, which became the basis of the electronics revolution. He excluded Brattain and Bardeen from the proceeds of this process, even though the idea may have been theirs. Another controversy associated with Shockley was his support of eugenics. He regarded his published works on this topic as the most important work of his career.