TSMC did delay the expected opening of its first Arizona semiconductor fab in July 2023, moving the target from late 2024 to 2025. The company’s explanation was specific: it could not find enough workers in the United States with experience installing and bringing up advanced semiconductor-factory equipment. That was not a claim that American workers generally lacked semiconductor skills. TSMC later said the fab entered high-volume N4 production in the fourth quarter of 2024, ahead of the revised forecast.
What TSMC actually delayed
The July 20, 2023 announcement concerned when the first Phoenix fab would become operational, not whether its building would be completed. Contemporary reporting said the building shell was already complete. The difficult phase was installing, connecting and qualifying the highly specialized process tools that turn a finished cleanroom into a working chip factory.
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Those milestones are different:
- Building completion: the physical structure and major facility systems are finished.
- Equipment installation: process tools are delivered, positioned, connected to power, gases, water and other utilities, and integrated with factory controls.
- Process qualification: engineers run wafers, tune the process and verify that the equipment performs consistently.
- High-volume manufacturing: the factory repeatedly produces commercial wafers at production scale.
Thus, “opening” in the 2023 headline was a shorthand for the expected operational or production milestone, not evidence that construction had stopped.
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The schedule changed more than once
| Period | Forecast or result |
|---|---|
| Before July 2023 | First fab commonly expected to be operational in late 2024. |
| July 2023 | TSMC moved the expected operational date to 2025. |
| April 2024 | TSMC said first-fab production was on track for the first half of 2025. |
| Q4 2024 | TSMC says high-volume N4 production actually began. |
These were successive forecasts, not mutually exclusive claims about the same completed milestone. The 2023 delay was real, but the eventual high-volume start came earlier than the revised 2025 expectation.
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Sources: Ars Technica, TSMC’s April 8, 2024 announcement, and TSMC’s Arizona project page.
What “insufficient U.S. talent” meant
TSMC was describing a narrow labor-market problem: too few people in the United States with hands-on experience installing advanced semiconductor-production equipment inside a semiconductor-grade facility. That work combines cleanroom controls, precision mechanical installation, complex utility hookups, tool commissioning and the transition from construction to manufacturing.
It is different from saying the country has no capable electricians, pipefitters, construction managers, equipment engineers or semiconductor researchers. The United States has those skills, but the accumulated experience of building and ramping leading-edge fabs has been concentrated in Taiwan, South Korea, China and a small number of other manufacturing centers. ASML CEO Peter Wennink separately described experienced fab-construction and equipment-installation workers as a global constraint as more countries build fabs.
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The practical issue was therefore specialization and scale: an advanced fab requires a coordinated ecosystem of contractors, tool specialists, process engineers and operators who have done this particular work before.
Why Taiwanese specialists were sent to Arizona
TSMC said it would bring additional Taiwanese specialists to Arizona temporarily to accelerate equipment installation and ramp-up while continuing to hire and train U.S. workers. The available reporting did not establish a confirmed number of additional Taiwanese employees.
This distinction matters. Construction labor, short-term equipment-installation specialists, process engineers and permanent fab operators are different groups. Temporary overseas expertise can transfer know-how and protect a schedule; it does not by itself prove that TSMC intended to replace the long-term U.S. workforce.
How the labor dispute complicated the fix
The imported-specialist plan collided with tensions involving U.S. construction unions. Ars Technica reported allegations from union electricians that Taiwanese workers could displace American labor. Reporting also described an incentive-pay dispute that led some U.S. workers to leave; TSMC later restored the incentive pay. A proposal to make Taiwanese workers available to a union contractor created another point of friction because union contractors generally obtain workers through union hiring systems.
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Those accounts should be read as attributed claims and disputes, not as a proven finding that TSMC sought to evade unions or permanently substitute foreign workers. They show the operational difficulty of combining a Taiwan-developed construction model with U.S. labor arrangements.
Labor was not the only challenge
TSMC also said U.S. building costs were higher than in Taiwan. The Arizona project therefore faced at least three linked constraints:
- Workforce: a shortage of specialized fab-installation experience.
- Cost: higher U.S. construction and operating expenses.
- Execution: adapting established processes to U.S. contractors, regulations, supply chains and labor rules.
Reducing the story to “there were not enough workers” misses the economics and coordination required to reproduce a sophisticated manufacturing operation outside its home base.
Why Washington treated the delay as a policy test
TSMC’s Arizona project was a flagship test of whether the United States could rebuild leading-edge chip manufacturing, not merely announce it. Domestic production is intended to give U.S. customers closer access to advanced chips, reduce dependence on Taiwan-based supply, and improve resilience amid U.S.-China tensions.
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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteIt also exposed a tension inside the CHIPS Act strategy. Public subsidies are meant to create American capacity and high-paying jobs, yet the fastest way to build a first-of-its-kind U.S. fab may require importing experienced specialists. Restricting that expertise too sharply could delay production; relying on it indefinitely would leave the workforce-development problem unresolved.
In November 2024, the Commerce Department announced an award of up to $6.6 billion in direct CHIPS funding and up to $5 billion in proposed loans. TSMC’s plan called for more than $65 billion of investment across three Phoenix fabs and approximately 6,000 direct high-tech jobs across those first three facilities.
Sources: U.S. Department of Commerce and TSMC.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What happened after the 2023 delay
First fab: production began in Q4 2024
TSMC’s current Arizona materials say the first fab began high-volume production using its N4 process in the fourth quarter of 2024. TSMC has also said the fab’s yield was comparable to that of its Taiwan fabs. That yield comparison is a company-reported claim, not an independently audited measurement in the cited material.
Source: TSMC Arizona and TSMC’s customer newsletter.
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The second fab is not simply the original first-fab timetable shifted forward. TSMC says its structure was complete and that N3 volume production is targeted for the second half of 2027.
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Third fab: the Arizona plan expanded
Construction of a third fab began in 2025. TSMC intends that facility for N2 and A16 technologies, with production targeted by the end of the decade. The project has therefore grown beyond the original roughly $40 billion, two-fab concept into a larger advanced-manufacturing cluster.
Sources: TSMC Arizona, TSMC 2025 Annual Report, and TSMC 2026 annual-meeting minutes.
The broader lesson for U.S. chip manufacturing
The Arizona episode was not evidence that Americans cannot build fabs. It showed that advanced semiconductor manufacturing depends on a specialized operating system: experienced equipment installers, cleanroom and utility contractors, process engineers, supply-chain partners, training programs and labor agreements that work together.
TSMC ultimately demonstrated that imported expertise and continued U.S. hiring could get the first facility into high-volume production. The harder long-term question is whether Arizona can develop enough local experience to make that success repeatable for the second and third fabs without relying on an emergency surge of overseas specialists.
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