The United States is the 4nd largest producer of Silicon wafers (Japan, Taiwan, and South Korea are ahead today) with Intel having their own facilities to produce them in the USA last I checked, as for the machinery, currently majority is made in the USA (and around 80-90% of American production is exported), with a smaller amount being produced in Japan and Taiwan.

Human made is over rated.

Machines are better then we are, and typically more consistent in production. Intel's IC's for example since I'm on the topic went from a failure rate of over 75% in the late 1970's where human involvement was more direct, to today, where human interference is minimized a great deal to less then 100ppm (or 0.01%) defect rates, while decreasing the fabrication size from 10um (~0.0004 inches) to 22nm (~.0000008 inches).

Jim