The US Closed a Chip-Tool "Loophole" in China. Samsung and SK Hynix Are Now Buying the Local Alternative.
A rule meant to starve China's semiconductor-equipment industry of customers just handed it two of the most demanding customers on the planet to practice on.
Five years, one chokepoint, one bypass
Step through what happened to the pipeline connecting U.S. chip-tool makers to two Korean-owned fabs in China — and the side route that opened once the pipe started narrowing. Use Next / Prev, the dots, or the arrow keys.
The plain version
For a decade, if a U.S. company wanted to sell advanced chipmaking equipment to a factory in China, it needed an export license — unless that factory held a special status called "Validated End-User." VEU status was a blanket permission slip: once granted, American toolmakers could ship approved equipment to that specific factory indefinitely, no case-by-case paperwork. Samsung's NAND flash plant in Xi'an and SK Hynix's DRAM fab in Wuxi and NAND plant in Dalian all had it — a legacy of a time when Washington judged these foreign-owned, well-monitored factories low-risk, even sitting inside China.
In September 2025, the Commerce Department pulled that status, calling it a loophole. The change took effect December 31, and just one day before the deadline, Commerce handed Samsung and SK Hynix a consolation prize: annual licenses instead of a blanket cutoff. The two companies can keep buying American tools for these fabs — but only to maintain what's already there, not for cutting-edge lithography, and only for one year at a time. Every December, they have to ask again.
That kind of yearly uncertainty is exactly what pushes a company to build a backup plan. Reuters reported in August 2026 that Samsung and SK Hynix have started testing etching tools from AMEC, a Chinese equipment maker, at these same fabs — insurance in case a future renewal doesn't go their way.
Here's the twist: these two companies are about as picky and technically demanding as customers get. If their engineers spend years proving an AMEC tool survives real production, that validation is worth more to AMEC than any single sale — it's the reference customer that opens doors with everyone else. A policy built to starve China's toolmakers of customers may be creating their best ones.
The expert version
The mechanism runs through the Export Administration Regulations' "Validated End-User" (VEU) program, which lets Commerce pre-authorize specific foreign facilities to receive controlled U.S.-origin items without transaction-by-transaction licensing, provided the facility passes site inspections and reporting requirements. Samsung China Semiconductor (Xi'an, NAND), SK Hynix Semiconductor China (Wuxi DRAM and Dalian NAND), Intel Semiconductor (Dalian), and TSMC Nanjing all held VEU authorization dating to earlier administrations, when Washington judged these foreign-owned, non-Chinese-controlled fabs low-risk enough to warrant blanket treatment despite their location.
BIS revoked all four authorizations via a rule published in the Federal Register on September 2, 2025, effective December 31, 2025, framing VEU as a loophole letting foreign-owned fabs receive equipment without the individual scrutiny applied to Chinese-owned competitors. On December 30, one day before the deadline, BIS granted Samsung and SK Hynix annual licenses for 2026 instead — a narrower substitute requiring the companies to file yearly plans detailing anticipated U.S.-origin equipment needs. Reporting indicates these licenses authorize maintenance and continued operation of existing toolsets, not process upgrades, and explicitly exclude EUV lithography and other frontier equipment.
Estimates put SK Hynix's Wuxi fab at roughly 30% of the company's total DRAM output (an estimated ~10% of global DRAM supply) and Samsung's Xi'an fab at 40–50% of its NAND output (~10% of global NAND supply) — production too large to relocate quickly if a future license is denied.
That renewal risk is the proximate cause of the hedge: Reuters reported in August 2026 that both companies have been testing etch tools from AMEC (Advanced Micro-Fabrication Equipment) at these China fabs, which currently depend heavily on Applied Materials and Lam Research equipment. TechInsights estimates Chinese-made tools undercut U.S. equivalents by 20–30% on price. Deutsche Bank projects Naura, AMEC, Piotech, and ACM Research will each clear $1 billion in 2026 revenue, together capturing 25–30% of China's roughly $28 billion wafer-fab-equipment market. Each qualification cycle at a top-tier fab compounds a domestic toolmaker's production yield data and reference-customer credibility — the same asset export controls were designed to deny it.