History of the transistor

Transistor technology timeline (summary)
Year Technology Organization
1947 Point contact Bell Labs
1948 Grown junction Bell Labs
1951 Alloy junction General Electric
1953 Surface barrier Philco
1953 JFET Bell Labs
1954 Diffused base Bell Labs
1954 Mesa Bell Labs
1959 Planar Fairchild
1959 MOSFET Bell Labs

A transistor is a semiconductor device with at least three terminals for connection to an electric circuit. In the common case, the third terminal controls the flow of current between the other two terminals. This can be used for amplification, as in the case of a radio receiver, or for rapid switching, as in the case of digital circuits. The transistor replaced the vacuum-tube triode, also called a (thermionic) valve, which was much larger in size and used significantly more power to operate.The first transistor was successfully demonstrated on December 23, 1947 at Bell Laboratories in Murray Hill, New Jersey. Bell Labs is the research arm of American Telephone and Telegraph (AT&T). The three individuals credited with the invention of the transistor were William Shockley, John Bardeen and Walter Brattain. The introduction of the transistor is often considered one of the most important inventions in history.[1][2]

Transistors are broadly classified into two categories: bipolar junction transistor (BJT) and field-effect transistor (FET).[3]

The principle of a field-effect transistor was proposed by Julius Edgar Lilienfeld in 1925.[4] John Bardeen, Walter Brattain and William Shockley invented the first working transistors at Bell Labs, the point-contact transistor in 1947. Shockley introduced the improved bipolar junction transistor in 1948, which entered production in the early 1950s and led to the first widespread use of transistors.

The MOSFET (metal–oxide–semiconductor field-effect transistor), also known as the MOS transistor, was invented by Mohamed Atalla and Dawon Kahng at Bell Labs in 1959. MOSFETs use even less power, which led to the mass-production of MOS transistors for a wide range of uses. The MOSFET has since become the most widely manufactured device in history.

  1. ^ Gaudin, Sharon. "The transistor: The most important invention of the 20th century?". ComputerWorld.
  2. ^ "History of the Transistor". www.sjsu.edu. Retrieved 17 January 2021.
  3. ^ "Types of Transistors – Junction Transistors and FETs". Electronics Hub. 23 April 2019. Retrieved 17 January 2021.
  4. ^ "What is a FET: Field Effect Transistor » Electronics Notes". www.electronics-notes.com. Retrieved 16 January 2021.

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