Advertisement for the Shockley 4-layer diode, including a diagram.
In 1955, Arnold O. Beckman and William Shockley entered business together when they established Shockley Semiconductor Laboratories as a subsidiary of Beckman Instruments, Inc. with the goal of mass producing semiconductors.The team of scientists that Shockely assembled, however, soon grew dissatisfied that with Shockley’s management and his direction of their work towards transistor diodes and away from semiconductors. In 1957, many of them left to form Fairchild Semiconductor, which did achieve the goal of mass-producing silicon semiconductor devices and marked the beginning of Silicon Valley. Shockley did produce a new, four-layer diode, although Beckman ultimately sold the renamed Shockley Transistor Company to Clevite Transistor Company in 1960.
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Clevite Transistor, and Charles Bowes Advertising. “You Can Count on 4-Layer Diodes,” 1960. Beckman Historical Collection, Box 49, Folder 18. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/3n203z084.
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