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How did semiconductors give Silicon Valley its name?

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Map of Silicon Valley with colored markers showing tech locations: blue historically important offices, green HQs, orange offices, and purple clusters across the Bay Area. — Silicon Valley Silicon Valley highlighting key historic tech offices, major tech headquarters, and offices with headquarters elsewhere.

The name "Silicon Valley" is derived from the dense concentration of electronics and computer companies that emerged in the region south of the San Francisco Bay beginning in the mid-20th century.1

The term specifically references silicon, which serves as the base material for the semiconductors used in computer circuits. Silicon is the most important semiconductor in the technology sector because its atomic structure allows it to be "doped" with other elements to create the transistors and integrated circuits that form the foundation of modern computing.12

The region's identity was solidified by pioneering firms such as Fairchild Semiconductor, which manufactured silicon-based transistors and integrated circuits. As former employees of these early companies founded dozens of additional startups in the area, the region became globally synonymous with the rise of the computer industry and the digital economy.34