Taiwan Semiconductor Manufacturing Company (TSMC), the world's largest contract chipmaker, has decided to build four more advanced chip fabrication plants in Arizona, according to GIGAZINE. The new facilities will produce chips using TSMC's cutting-edge 2-nanometer process — among the most advanced manufacturing technology in the industry.

The expansion is backed by an additional US$100 billion investment pledge, as reported by Focus Taiwan. According to Yahoo Finance, that brings TSMC's planned total to 12 manufacturing facilities in the United States. TechRepublic reports the move lifts TSMC's overall U.S. investment to $265 billion, driven by surging demand for AI chips and by geopolitical risk tied to concentrating chip production in Taiwan.

The timing is notable. According to verdict.co.uk, TSMC announced the added Arizona commitment as its second-quarter net income rose 77%, signaling that the AI-fueled boom is translating into strong profits.

The American Institute in Taiwan (AIT) welcomed the additional pledge, per Focus Taiwan — a sign of the strategic weight Washington places on bringing chip production onto U.S. soil.

The ripple effects extend beyond the factories themselves. According to 天下雜誌 (CommonWealth Magazine), the $100 billion Arizona expansion is triggering a broad shift of TSMC's supply chain toward the United States, as the suppliers and partners that surround a chip plant follow it across the Pacific.

(One outlet, New Electronics, described the figure as "$100m," but the weight of the reporting points to a $100 billion pledge.)

Why it matters: Advanced semiconductors power everything from smartphones to AI data centers, and TSMC's expanded Arizona bet moves a critical slice of that supply chain — and the jobs and leverage that come with it — from Taiwan to the United States.