This doesn't answer your question but your question made me think of this and I thought I'd share for anyone else.
The Bay Area used to be the center of these companies’ manufacturing and I was there when they literally unbolted the Varian sputter machines from my company to ship to Malaysia. The likes of Seagate, Western Digital, Conner, Quantum, Maxtor, Micropolis, Hitachi, Fujitsu, IBM, Read-Rite. Also Iomega in Utah. They were all here. They all left practically overnight. They were executive decisions. It was a shocking move and the whole history would make a good documentary or movie.