The building where Saeed Amidi runs his global venture empire was once one of the most important semiconductor facilities on the West Coast. Philips Electronics operated a fabrication plant here in Sunnyvale, California, employing 8,000 people at its peak. Then, like much of America’s chip manufacturing base, it moved to Asia — to Taiwan, to Korea, to the supply chains that would come to define the global electronics industry for the next three decades.