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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Qualified answer: A Center for Technology & Statecraft (CTS) estimate, relayed by secondary coverage, puts the number of DUV immersion (DUVi) lithography tools at Chinese-owned fabs at 343 by early 2026, including about 270 ASML NXT:1980i systems. DUV immersion can be used with multipatterning to produce advanced logic features, including those associated with 7 nm processes, but that is not the same as EUV production economics. The available evidence does not establish that this fleet can manufacture high-bandwidth memory (HBM).
What does the reported 343-tool figure mean?
The figure is an estimate attributed to CTS, not an independently audited census of machines confirmed to be installed and operating. AI Weekly’s October 3, 2026 secondary account of the CTS report and South China Morning Post coverage gives the following figures; the underlying CTS report and original SCMP article were not directly accessible for verification.
| Reported figure | What it refers to | Attribution and qualification |
|---|---|---|
| 343 tools | DUVi systems at Chinese-owned fabs by early 2026 | CTS estimate as relayed by AI Weekly in 2026; operational status and counting methodology are not provided in the accessible account. |
| About 270 tools | ASML NXT:1980i systems within the reported total | CTS estimate as relayed by AI Weekly in 2026; not an independently verified installed-and-running count. |
| More than $13 billion | Reported spending on NXT:1980i machines in 2024 and 2025 | CTS estimate as relayed by AI Weekly in 2026; the account does not provide a detailed spending methodology. |
| About 90 in 2024; 89 in 2025 | Reported NXT:1980i acquisitions in those years | CTS estimates as relayed by AI Weekly in 2026; the figures do not establish how many were installed or in use. |
| 70 percent | Share of ASML DUVi tool sales in 2024 attributed to Chinese entities | American Enterprise Institute (AEI), April 2026, citing its underlying research. This is a sales attribution for that year, not the share of the global DUVi fleet owned by China. |
These figures describe different things: a reported fleet estimate, a subset identified by model, estimated spending and annual acquisitions, and a one-year sales share. They should not be combined into a claim that a specific number of machines are currently producing chips.
Can DUV immersion make 7 nm logic chips?
It can contribute to making advanced logic features, but not by printing every feature in one pass. Lithography transfers circuit patterns onto silicon wafers using light. Conventional DUV tools use 193 nm light; immersion lithography places purified water between the lens and wafer to improve resolution. Since a single DUV exposure cannot print every small feature required by an advanced design, manufacturers can apply multiple exposures to critical layers and combine the resulting patterns. This approach is called multipatterning.
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Why multipatterning matters
In AEI’s April 2026 analysis, a modern 7 nm logic chip goes through more than 80 lithography steps. Around a dozen especially critical layers may be exposed two or four times using older DUV immersion tools. The multiple exposures let DUV extend to patterns beyond what a single exposure could resolve, but add steps and consume scanner capacity.
Patterning is not the same as competitive mass production
A process-node label alone does not establish comparable transistor density, throughput, yield or manufacturing cost. AEI estimates that SMIC’s DUV-based 5 nm process costs 40–50 percent more than TSMC’s equivalent and could have yields as low as 20 percent. Those are estimates presented by AEI, not independently verified industry-wide measurements. They illustrate why demonstrating that a process can pattern advanced features does not, by itself, show that it can make chips at the same cost or production efficiency as another process.
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How does DUV multipatterning compare with EUV?
EUV uses a much shorter wavelength than DUV, while DUV multipatterning relies on repeated exposures to extend the capability of 193 nm immersion tools. Both can be discussed in relation to advanced feature sizes, but that does not make their manufacturing routes interchangeable.
| Comparison | DUV immersion with multipatterning | EUV |
|---|---|---|
| How patterns are produced | Critical layers can require two, three or four exposures; AEI says roughly a dozen critical layers may be doubled or quadrupled in a modern 7 nm logic process. | AEI describes EUV as using a much shorter wavelength; the cited analysis does not state a comparable exposure count for the processes discussed. |
| Lithography workload | AEI says a modern 7 nm logic chip passes through more than 80 lithography steps, with repeated exposures adding steps and scanner demand. | A directly comparable total step count is not stated in the cited AEI analysis. |
| Cost and yield | For SMIC’s DUV-based 5 nm process, AEI estimates 40–50 percent higher cost than TSMC’s equivalent and yields as low as 20 percent. | Comparable cost and yield figures are not stated in the cited AEI analysis. |
The practical distinction is the burden of producing the patterns, not simply whether a node number can be attached to the result. Repeated DUV exposures add process complexity, scanner time and potential cost and yield tradeoffs. The figures above are specific estimates from AEI’s analysis, not a universal cost or yield comparison for every DUV and EUV process.
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Does the reported DUVi fleet establish that China can make HBM?
No. The accessible CTS-related secondary account repeats the HBM framing but does not explain or substantiate a manufacturing pathway connecting this DUVi fleet to HBM production. The U.S. Bureau of Industry and Security (BIS) confirms that certain HBM is a distinct export-control concern, but that does not show that the reported immersion tools enable its manufacture.
HBM is a memory product, and the available material here does not document the specific process steps or equipment needed to link the reported DUVi inventory to HBM output. The supported conclusion is therefore narrower: the fleet estimate concerns lithography equipment, and the claim that this fleet can make HBM is unverified by the accessible sources.
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What do the reports say about export controls?
The CTS authors reportedly recommend a China-wide ban on DUVi exports. That is a policy recommendation, not an enacted ban. AEI’s April 2026 analysis separately recommends capability-based controls, a countrywide presumption of denial and restrictions on servicing deployed tools; those are also recommendations, not a description of current law.
BIS announced semiconductor-related export controls in December 2024 covering specified manufacturing equipment; software that can improve the productivity of advanced equipment or help less-advanced machines produce advanced chips; certain HBM; and related foreign-produced items under specified Export Administration Regulations rules. That announcement is background on measures announced at that time, not a complete current licensing guide. Whether a particular DUVi model or shipment can legally be exported to China depends on current regulations and the specific transaction; the cited announcement alone does not establish that answer.
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