TSMC Arizona Phase‑1 to target ~25,000 wafers‑per‑month throughput
- Taiwan Semiconductor Manufacturing Co.’s first Arizona fab is already in high-volume 4-nanometer production, with outside reports pegging Phase 1 capacity near 24,000 wafers monthly. - TSMC’s own roadmap now puts Arizona Fab 2 on 3-nanometer technology in 2028, while the broader Phoenix campus adds packaging and research. - Arizona is growing as a diversification hub, not a Taiwan replacement, as TSMC keeps its biggest leading-edge base at home. (tsmc.com)
A semiconductor fab is a factory that prints circuits onto silicon wafers, like stamping hundreds of chips onto one dinner-plate-sized disk. TSMC’s first Arizona fab is now doing that in volume on its 4-nanometer process. (tsmc.com 1) (tsmc.com 2) TSMC said in its 2024 annual report that the first Phoenix fab entered volume production in the fourth quarter of 2024. The company said yields there are comparable to its fabs in Taiwan. (tsmc.com 1) (tsmc.com 2) The company does not publish a precise monthly output figure for Fab 21 Phase 1 on its Arizona site. But reporting based on Tim Culpan’s sourcing has put current output near 10,000 wafers a month and full Phase 1 capacity around 24,000 wafers a month. (extremetech.com) (appleinsider.com) That is the basis for the “about 25,000 wafers per month” figure now circulating around Arizona Phase 1. It describes a modest advanced-node fab by TSMC standards, not a one-for-one copy of the giant campuses it runs in Taiwan. (extremetech.com) (tsmc.com) TSMC’s official roadmap for the site is bigger than that first building. In April 2024, the company said Fab 2 in Arizona would add 2-nanometer capability alongside previously announced 3-nanometer production, with production beginning in 2028. (tsmc.com 1) (tsmc.com 2) In March 2025, TSMC expanded the U.S. plan again, saying it would raise total U.S. investment to $165 billion. The package includes three new fabrication plants, two advanced packaging facilities, and a major research and development team center in Arizona. (tsmc.com) Advanced packaging is the back-end step that connects finished chips to each other and to the outside world, more like assembling a high-performance engine than printing a wafer. TSMC said those new Arizona packaging facilities would help complete a domestic artificial-intelligence chip supply chain. (tsmc.com) The customer list shows why the site matters. TSMC has named Apple, Nvidia, AMD, Broadcom, and Qualcomm among the U.S. technology companies tied to its Arizona expansion, while outside reporting has linked Phase 1 output to Apple and AMD products. (tsmc.com) (extremetech.com) The Arizona campus is large by U.S. industrial-policy standards even if the first fab is relatively small by TSMC standards. The company says the site spans more than 1,100 acres, employs more than 3,000 people, and has been in volume production since late 2024. (tsmc.com) (tsmc.com) The cleanest way to read the 25,000-wafer figure is as a Phase 1 throughput target for one part of a much larger buildout. TSMC’s own statements point to Arizona as an expanding U.S. outpost for advanced manufacturing, packaging, and research, while Taiwan remains the company’s main leading-edge base. (tsmc.com) (tsmc.com)
