TSMC floats 12 Arizona plants, but details are thin

TSMC says its expanded US investment could eventually bring its Arizona total to 12 facilities, up from the eight it had previously outlined. But the company’s own wording leaves plenty of room for doubt.

Roughly a year ago, TSMC said it would accelerate work on its second and third Arizona plants, with Apple expected to be the first customer of the third site. Even then, questions remained about how much US production would matter for Apple, because TSMC keeps its most advanced manufacturing processes in Taiwan. That means the planned US fabs would only be able to produce chips for older Apple devices, typically around three generations old.

There were also concerns about what happens after fabrication. Apple chips rely on multiple components being combined through packaging, and the initial plan was for US-made chips to be sent back to Taiwan for that stage. One analyst described the Arizona effort as a “paperweight.” TSMC later said it would build its own US packaging facilities, helping push the total planned US sites to eight.

Recommended reading

Samsung 990 SSD hits 7,250 MB/s with a 2TB option

The latest push comes from the Trump administration, which said TSMC has agreed to invest an additional $100 billion in advanced semiconductor manufacturing and packaging in Arizona. According to the White House and the Department of Commerce, TSMC’s total US investment would reach $265 billion and support 12 facilities in the country.

TSMC’s public comments are more cautious. BBC News reported that CEO CC Wei said the extra spending would “likely” lead to four new plants in Arizona, but he gave no timeline, saying the buildout would depend on the “market situation.” That uncertainty may matter more as Apple also looks to work with other chipmakers, including Intel and Samsung.

For now, the biggest number in the announcement is clear. The schedule for turning it into real factories is not.