Also, many people don't realize that Intel doesn't make their manufacturing equipment. They work closely with the companies that do, and provide them research a

Also, many people don't realize that Intel doesn't make their manufacturing equipment. They work closely with the companies that do, and provide them research and have exclusive deals, but tsmc and Samsung probably buy the same brand fab equipment. Factory construction and such matters a lot too though, Intel closed a plant in new Mexico recently, and the yields were likely lower due to a difference in elevation