Silicon Valley.

Annalee Saxenian,The Genesis of Silicon Valley(1985):
The region's most dynamic growth phase was associated with the birth of a revolutionary new industry, the semiconductor industry. In 1955, William Shockley established Santa Clara County's first semiconductor firm. Shockley, one of three original inventors of the transistor, returned to Palo Alto from Bell Laboratories to establish Shockley Transistor Company. He thus established one of the original spin-offs, in an industry that came to be characterized by this defection process. In 1957, eight of Shockley's best scientists in turn broke off themselves and gained financial backing from Fairchild Camera and Instrument to start their own firm. By 1965, ten new Santa Clara County semiconductor firms had spun-off from Fairchild, and the Santa Clara Valley had replaced Boston as the centre of gravity for new electronic firm locations. Between 1959 and 1979, Fairchild Semiconductor spawned an amazing total of fifty new companies in the county, (p. 25).