description Jean Hoerni Overview
Jean Hoerni was a Swiss-born physicist and one of the co-founders of Fairchild Semiconductor in 1957. His invention of the planar process in 1959 fundamentally changed the electronics industry by using a silicon oxide layer to protect sensitive junctions on a microchip. This manufacturing breakthrough allowed for the reliable, mass production of modern silicon integrated circuits.
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What was Jean Hoerni's planar process?
Hoerni's planar process protected a silicon device's surface with a layer of silicon dioxide while electrical connections were formed through openings in that layer. Developed at Fairchild Semiconductor in 1959, it made semiconductor devices more reliable and easier to manufacture in quantity.
How did Hoerni's invention help create the integrated circuit?
Robert Noyce recognized that Hoerni's planar method could connect multiple components on a single silicon chip using deposited metal lines. That approach became the basis of Fairchild's practical monolithic integrated circuits.
Was Jean Hoerni one of the Traitorous Eight?
Yes. Hoerni was among the eight scientists who left William Shockley's laboratory in 1957 to establish Fairchild Semiconductor.
What companies did Jean Hoerni found after Fairchild?
Hoerni later helped establish semiconductor companies including Amelco and Intersil. These ventures formed part of the network of Fairchild spin-offs that shaped Silicon Valley.
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