— PHOENIXThe largest foreign manufacturer of advanced semiconductors broke ground on Friday on a third fabrication plant outside Phoenix, the deepest commitment yet by an overseas chipmaker to American soil and the latest evidence that the geography of the most important supply chain in the modern economy is in active transition.

The new facility, which is expected to take more than four years to complete, will house production lines for the company's most advanced process node and will, at full ramp, employ more than three thousand engineers and technicians. It is the third plant the firm has committed to in Arizona since the United States passed its landmark semiconductor incentive package in 2022.

"This is not an investment that pays back in a quarter, or a year, or a presidency," the company's chief executive said at the ground-breaking ceremony, standing on a concrete pad against the bare backdrop of the Sonoran Desert. "It is an investment that pays back across a generation."

Industry analysts cautioned that the headline numbers, while remarkable, conceal a more complicated picture. The first of the company's Arizona plants has faced repeated delays, cost overruns and a difficult debate over the differences between Taiwanese and American factory culture. The second plant is on a tighter schedule but has yet to begin volume production.

Even so, the symbolism of Friday's announcement was hard to miss. American policymakers across the political spectrum have made the reshoring of semiconductor capacity a central element of industrial policy, and Taiwanese officials see ever-deeper ties to the American manufacturing base as a stabiliser in an increasingly uncertain regional security picture. The chips, for the moment, are caught in a slow-motion negotiation between the two strategies.