In Santa Clara County, California, U.S.A. lies a concentrated area of high technology industries of electronics, which is called ‘Silicon Valley’, In the field of the high technology industry, ‘Silicon Valley’ is matched for New England. In the second half of 1930's, the pioneering enterprises appeared in this area under the leadership of the Stanford University. Since 1960's, the industry has mervelously developed, and this area has proved to be one of the biggest center of high technology industry in U.S.A. Nowaday, factories are distributed from Palo Alto to Gilroy in the form of industrial Park. The industrial activity in Silicon Valley is characterized by (1) an accumulation of R & D function having a strong connection with Stanford University, and by (2) the Venture Capital Supporting the industrial activety. Recently, the condition for the industrial acthvity have been becoming worse on account of the rise in land price, traffic jam which were coused by over congestion of factories. For that reason more and more enterprises transfer their factories to other area where Land Price is lower. Nevertheless, they leave their R & D function in Silicon Valley as they were.