Information Age
Transistors

The onset of the Information Age can be associated with the development of transistor technology. The concept of a field-effect transistor was first theorized by Julius Edgar Lilienfeld in 1925. The first practical transistor was the point-contact transistor, invented by the engineers Walter Houser Brattain and John Bardeen while working for William Shockley at Bell Labs in 1947. This was a breakthrough that laid the foundations for modern technology. Shockley's research team also invented the bipolar junction transistor in 1952. The most widely used type of transistor is the metal–oxide–semiconductor field-effect transistor (MOSFET), invented by Mohamed M. Atalla and Dawon Kahng at Bell Labs in 1960. The complementary MOS (CMOS) fabrication process was developed by Frank Wanlass and Chih-Tang Sah in 1963.
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