Silicon TransistorIn 1953, William Shockley left Bell Labs in a disagreement over the handling of the invention of the transistor. After returning to California Institute of Technology for a short while, Shockley moved to Mountain View, California in 1956, and founded Shockley Semiconductor Laboratory. Unlike many other researchers who used germanium as the semiconductor material, Shockley believed that silicon was the better material for making transistors. Shockley intended to replace the current transistor with a new three-element design (today known as the Shockley diode), but the design was considerably more difficult to build than the "simple" transistor. In 1957, Shockley decided to end research on the silicon transistor. As a result, eight engineers left the company to form Fairchild Semiconductor. Two of the original employees of Fairchild Semiconductor, Robert Noyce and Gordon Moore, would go on to found Intel.
Venture CapitalBy the early 1970s there were numerous semiconductor companies in Silicon Valley, computer firms using their devices, and programming and service companies serving both. Industrial space was plentiful and housing was still inexpensive. The growth was fueled by the emergence of the venture capital industry on Sand Hill Road, beginning with Kleiner Perkins in 1972; the availability of venture capital exploded after the successful $1.3 billion IPO of Apple Computer in December 1980.
Rise of SoftwareAlthough semiconductors are still a major component of the area's economy, Silicon Valley has been most famous in recent years for innovations in software and internet services. Research done in Silicon Valley has significantly influenced computer operating systems, software, and user interfaces.
While at Stanford Research Institute in the mid 1960s, Doug Engelbart invented the mouse and hypertext-based collaboration tools. When Engelbart's Augmentation Research Center declined in influence due to the loss of government funding, Xerox hired some of Engelbart's best researchers. In the 1970s and 80s, Xerox's Palo Alto Research Center (PARC) played a pivotal role in object-oriented programming, graphical user interfaces (GUIs), Ethernet, PostScript, and laser printers.
While Xerox marketed equipment using its technologies, for the most part its technologies flourished elsewhere. Xerox innovations led directly to the formation of 3Com and Adobe Systems, and indirectly to Cisco, Apple Computer and Microsoft. Apple's Macintosh GUI was largely a result of Steve Jobs' visit to PARC and the subsequent hiring of key personnel. Microsoft's Windows GUI is based on Apple's work. Cisco's impetus stemmed from the need to route a variety of protocols over Stanford's campus Ethernet.