Silicon Valley is a region in the southern part of the San Francisco Bay Area in Northern California that serves as a global center for high technology and innovation. Silicon valley jobs, silicon valley in india, santa clara valley history, silicon valley movie, silicon valley disambiguation, east bay south bay map. Silicon Valley is called Silicon Valley because of sand. Many companies manufacturing computer chips (like Intel) were either operating or headquartered throughout the region, now known as Silicon Valley back, in 1971. The first ingredient in the manufacturing process of computer chips happens to be – sand. Silicon Valley is the U.S. center for innovative technology companies. It's located south of San Francisco, California. It's home to 2,000 tech companies, the densest concentration in the world. This proximity to suppliers, customers, and cutting-edge research gives each a competitive advantage. Source of news and commentary about technology, startups, innovation and tech policy.