Transistor invention notes, 1947

Transistor invention notes, 1947

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Credit: EMILIO SEGRE VISUAL ARCHIVES/AMERICAN INSTITUTE OF PHYSICS/SCIENCE PHOTO LIBRARY

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Caption: Transistor invention notes. Laboratory notes and circuit diagram describing the invention of the transistor on 23 December 1947 by US physicist Walter Brattain (1902-1987). The counter-signing (by Gerald Pearson and Hilbert Moore) was the following day. This work was done by Brattain with his fellow US physicists John Bardeen and William Shockley (both named at right), at Bell Laboratories, New Jersey, USA. The key result was obtaining greater output power, as described in the notes. All three physicists shared the 1956 Nobel Prize in Physics for this work. Transistors are key components in modern solid-state electronics.

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