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TSMC’s 3-nanometer production is not being held back by one publicly identified machine. The better-supported explanation is a combination of exceptionally strong AI and high-performance-computing demand, already constrained fab capacity, and upstream suppliers struggling to deliver equipment and materials quickly enough. TSMC says it is adding capacity in Taiwan, the United States and Japan, but much of that expansion arrives in 2027 and 2028 rather than immediately.
Why 3-nm capacity is under pressure
Advanced chips have moved from a specialist product to a major part of TSMC’s business. TSMC’s 2025 annual report said 3-nanometer technologies generated 24% of total wafer revenue in 2025, their third full year of volume ramp. That is a wafer-revenue measure for the full year, not a percentage of all chips shipped.
Reuters reported a different measure for the first quarter of 2026: advanced 3-nm chips accounted for about one quarter of TSMC sales, up from 6% in the third quarter of 2023. The figures show the node’s rising commercial importance, but they should not be treated as identical statistics.
The annual report attributed continuing demand for 7-nm and more advanced technologies to smartphones, high-performance computing, automotive products and internet-of-things devices. AI accelerators and related data-center processors have made the high-performance-computing portion particularly urgent, leaving little spare capacity when customers increase orders.
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What TSMC has said about the squeeze
Capacity remains very tight
In its April 16, 2026 earnings coverage, Reuters reported that TSMC said 3-nm production capacity remained “very tight.” The company said it was expanding output in Taiwan, the United States and Japan to support greater production in 2027 and 2028.
At a June 2026 shareholder meeting, CEO C.C. Wei described the demand problem directly: “Customer demand is so high, and we can only support so much. We are already working very hard.” He also said, “We are doing our best to ensure TSMC does not become a bottleneck.” Those comments indicate a system-wide capacity challenge, not a confirmed failure of one particular tool.
Suppliers are struggling to keep up
Wei said many suppliers and upstream vendors were struggling to meet demand as AI growth accelerated. That statement supports an equipment-supply and manufacturing-readiness angle: even when TSMC commits capital to a new line, the line depends on specialized lithography, deposition, etch, metrology, packaging and facility systems arriving, being installed and being qualified on schedule.
Reuters also reported that TSMC had built safety stock of helium and hydrogen and maintained suppliers across several regions amid possible material-supply disruptions. These precautions show that materials and logistics are part of the risk picture, but they do not identify a single missing gas, machine or vendor as the definitive 3-nm bottleneck.
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What “tool struggles” means in practice
Advanced-node capacity is a chain of interdependent steps. A fab cannot produce more wafers simply by buying one additional lithography scanner if other process tools, clean-room infrastructure, technicians, utilities or inspection capacity are not ready. A delay in any of those areas can postpone a complete production line.
- Equipment delivery: specialized tools have long manufacturing, shipment and installation schedules, and suppliers may be serving several chipmakers at once.
- Qualification: a delivered machine must be tuned and qualified for a particular process before it contributes reliable high-volume output.
- Materials and utilities: high-purity gases, chemicals, power, water and facility systems must remain available at production quality.
- Workforce and construction: Reuters cited environmental-permit delays and shortages of construction workers affecting U.S. expansion.
- Customer allocation: available wafers are allocated among customers and products; aggregate capacity can therefore look larger than the immediately available supply for a specific design.
High-NA EUV is a cost question, not the proven 3-nm bottleneck
Reuters reported that TSMC is researching ASML’s High-NA extreme-ultraviolet equipment. Wei said the company does not currently need it for production because “the cost is still somewhat high,” adding that TSMC would work to lower the cost and use the technology when the economics made sense.
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That is evidence about the business case for a newer lithography platform. It is not an admission that High-NA tools are the specific machines missing from current 3-nm production. Existing 3-nm manufacturing uses an established process flow, while High-NA adoption depends on whether its performance benefit justifies the capital and operating cost for a given generation.
Where new capacity is scheduled
| Location or program | What has been disclosed | Timing and qualification |
|---|---|---|
| Taiwan | TSMC is expanding 3-nm capacity as part of its home-market manufacturing base. | Reuters described greater output as part of the 2027–2028 expansion outlook; a comparable fab-by-fab wafer figure was not stated. |
| Arizona, United States | TSMC’s 2025 annual report said its second Arizona fab was expected to enter high-volume manufacturing. | High-volume manufacturing was expected in the second half of 2027, according to the 2025 report. This was a plan and schedule, not a completed output result. |
| Japan | The annual report said TSMC planned 3-nm production at the second Japan Advanced Semiconductor Manufacturing (JASM) fab in Kumamoto. | The report described the plan; it did not provide a comparable, confirmed wafer-capacity figure for the site. |
The geographic spread improves resilience and places output closer to important customers, but it also creates construction, staffing, permitting, supplier and process-transfer work in several regions at once.
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TechNode, citing supply-chain sources and industry insiders, estimated Q2 2026 monthly 3-nm capacity at 160,000 to 175,000 wafers. That range is an industry estimate, not official TSMC guidance, and the report also said a backlog remained.
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The same TechNode report said second-half 2026 price increases of up to 15% were planned, citing insiders. “Up to” describes a reported plan rather than a confirmed final price change, and the applicable products or customer contracts were not specified.
TrendForce’s September compilation reported a 30% 3-nm sales contribution for Q2 2026 while relaying outside forecasts about later capacity and node-share changes. The 30% figure was presented as a reported company result; forecasts that 3-nm could surpass 5-nm later in 2026 remain projections, not TSMC-confirmed outcomes.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What could ease the constraint—and what could prolong it?
Capacity additions
New lines in Taiwan, Arizona and Kumamoto should increase supply if construction, equipment installation, staffing and yield qualification remain on schedule. The most visible relief is therefore more likely in 2027 and 2028 than immediately.
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Equipment and supplier scaling
TSMC’s ability to add wafers depends on its suppliers expanding alongside it. Tool makers must manufacture, ship and service complex systems, while materials vendors must maintain consistent quality and regional supply. A disruption at any stage can delay effective capacity even after a building is complete.
Demand and allocation
AI and HPC demand can absorb incremental output as quickly as it arrives. If customers continue increasing orders, a larger installed base may reduce, but not eliminate, tightness. TSMC’s allocation decisions can also prioritize strategic products rather than distribute every additional wafer evenly across customers.
What the evidence does—and does not—show
- It does show that 3-nm demand is commercially significant and that TSMC describes capacity as very tight.
- It does show that TSMC’s CEO sees broad supplier and upstream-vendor pressure amid rapid AI growth.
- It does show planned capacity expansion across Taiwan, the United States and Japan.
- It does not establish one tool, including High-NA EUV, as the sole cause of the output constraint.
- It does not turn trade-publication capacity or pricing estimates into official TSMC guidance.
What to watch next
The most useful indicators will be whether TSMC confirms progress on its 2027–2028 expansion schedule, reports changing 3-nm revenue contribution, and describes supplier delivery, materials availability and production yields. Updates on Arizona permits and construction labor, JASM’s second Kumamoto fab, and the economics of High-NA EUV will help distinguish temporary execution pressure from a longer-lasting structural shortage.
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