Samsung had and has a design center in the US manufacturing in Korea. WD had and has design in the US and pilot production in the US, manufacturing in Asia. As does Seagate.
But then, I only said the US companies as in Seagate, WD, Maxtor... switching to class 10 cleanrooms. In fact WD's San Jose facility completed a "state of the art class 10 cleanroom in their (at that time) new building In south San Jose (1996).