The physical supply chain that powers every artificial intelligence system on earth passes through a single chokepoint that has been effectively closed since early March. Not a data bottleneck. Not a software constraint. A 21-mile strait between Iran and Oman through which 30 percent of the world's LNG and 20 percent of its oil once flowed.
The chain that connects a bombed gas facility in Qatar to a GPU shortage in Santa Clara runs through helium extraction plants, semiconductor fabs, memory packaging lines, and LNG carrier shipyards. And every single link passes through the same country: South Korea. A country that is now simultaneously losing its oil supply, its gas supply, and its helium supply from the same chokepoint.
This is the story of how a missile strike on an LNG facility in the Persian Gulf becomes a constraint on every AI training cluster on earth.
The chain starts with a noble gas.
Helium is the second most abundant element in the universe and one of the rarest on Earth's surface. It is produced by the radioactive decay of uranium and thorium deep in the planet's crust. It migrates upward through rock over billions of years and accumulates in the same geological traps that hold natural gas. You do not manufacture helium. You extract it as a byproduct of natural gas processing, or you do not have it.
Qatar's three helium plants at Ras Laffan produce approximately 2.3 billion standard cubic feet per year: Helium 1 (660 million scf, online 2005), Helium 2 (1.3 billion scf, the world's largest, online 2013), and Helium 3 (400 million scf, online approximately 2021). That is roughly one-third of total global helium supply, according to the US Geological Survey's 2026 Mineral Commodity Summaries, which puts Qatar at 33.2 percent of world production.
All three plants have been offline since March 2, when Qatar halted LNG production following the outbreak of hostilities. The helium plants cannot operate independently of the LNG facility because helium is extracted from the natural gas stream during cryogenic liquefaction. When the gas stops flowing, the helium stops flowing.
QatarEnergy CEO Saad al-Kaabi confirmed on March 24 that the missile strikes reduced helium output capacity by 14 percent, with repairs expected to take three to five years. The planned Helium 4 plant, targeting 1.5 billion standard cubic feet per year and over 50 percent engineered before the crisis, has no confirmed restart timeline.
One-third of the world's helium. Removed from the market by the same missile strikes that took out 17 percent of global LNG supply. From the same facility. In the same week.
Helium is not a party balloon gas. It is the most critical process gas in chipmaking.
In semiconductor fabrication, helium performs functions that are difficult or impossible to replicate with any other substance.
Its most critical role is cooling silicon wafers during plasma etching. The etching process carves nanoscale circuit patterns into silicon at temperatures that would damage the wafer without precise thermal management. Helium's thermal conductivity is roughly six times higher than nitrogen and nearly nine times higher than argon. Only hydrogen is higher, but hydrogen is reactive and flammable, making it unsuitable for use in proximity to plasma chemistries. Lam Research, one of the world's largest etch equipment manufacturers, has acknowledged that nothing besides hydrogen matches helium's thermal conductivity, and hydrogen's reactivity disqualifies it. For backside wafer cooling during etch, there is no practical substitute deployed at scale today.
Semiconductors now consume roughly 21 to 25 percent of global helium, up from 6 percent in 2015. That share is growing fast as EUV-based manufacturing scales and chip geometries shrink. The semiconductor industry is the fastest-growing consumer of helium on earth, and it is now the most exposed.
South Korea's triple exposure.
South Korea imports 64.7 percent of its helium from Qatar, according to Korea International Trade Association data for 2025.
South Korea is home to Samsung Electronics and SK Hynix, which together dominate global memory production. SK Hynix commands 62 percent of the High Bandwidth Memory market by shipment volume as of Q2 2025, per Counterpoint Research. Samsung holds 33 percent of global DRAM market share. Combined, these two companies produce the majority of the memory chips that go into every AI training system, every data centre GPU, and every high-performance computing cluster on earth.
HBM is the single most critical constraint in the AI hardware supply chain. It is the component NVIDIA cannot build an H100, B200, or Blackwell Ultra without. SK Hynix is NVIDIA's primary HBM supplier. In the first half of 2025, NVIDIA accounted for 27 percent of SK Hynix's total revenue, approximately 10.9 trillion Korean won, per TrendForce. UBS projects SK Hynix will capture roughly 70 percent of the HBM4 market for NVIDIA's next-generation Rubin platform. HBM capacity is sold out through 2026 across all major suppliers. There is zero slack.
Bank of America defines 2026 as a memory supercycle, forecasting the HBM market to reach $54.6 billion, a 58 percent increase year over year. This is the market that South Korea's energy crisis now threatens.
Now layer the other exposures.
South Korea imports approximately 70 percent of its crude oil from the Middle East.
Seoul implemented mandatory fuel rationing on March 25: a one-day-per-week vehicle ban for 1.5 million government vehicles, enforced by licence plate number.
QatarEnergy declared force majeure on long-term LNG contracts with South Korea on March 24. Gas generates approximately 26 percent of South Korea's electricity. Those contracted molecules, which were supposed to flow reliably for decades, now carry a force majeure notice that could last five years.
South Korea is losing three supply lines simultaneously. Oil. Gas. Helium. All from the same chokepoint.
The country that fabricates the memory chips that make artificial intelligence physically possible is being energy-starved by a war it did not start, in a strait it does not control, over a conflict between nations it has no leverage to influence.
What the chipmakers say and what it means.
The United States produces 42 percent of global helium but cannot rapidly scale. The former Federal Helium Reserve in Amarillo was privatised in June 2024 and can no longer serve as a government strategic buffer. Russia's Amur Gas Processing Plant has design capacity roughly equal to Qatar's entire output but faces Western sanctions. Algeria produces only 5 to 10 percent of global supply. Tanzania's emerging helium projects are years from commercial production.
Phil Kornbluth estimates a minimum three-month disruption to helium supply chains, plus two months for logistics normalisation. If the conflict extends beyond six months, the structural deficit has no easy solution.
Taiwan's quiet vulnerability.
Taiwan generates approximately 43 to 47 percent of its electricity from natural gas, the single largest source in its power mix. The island imports nearly all of its energy. It has no domestic oil, no domestic gas, and no domestic coal of significance.
TSMC, which fabricates over 90 percent of the world's most advanced logic chips (sub-3nm), consumes roughly 9 to 10 percent of Taiwan's total electricity, a figure S&P Global projects could reach 24 percent by 2030 under a high-growth scenario as EUV lithography scales. TSMC's electricity consumption has more than doubled since 2017.
With Hormuz closed and Qatar offline, global LNG prices have surged 40 to 60 percent. Taiwan must now compete with Europe, Japan, South Korea, and China for a diminished pool of spot LNG cargoes. Every dollar increase in LNG cost translates to higher electricity generation costs for an island that runs nearly half its grid on imported gas.
The world's most important chip factory runs on imported gas, on an island with no strategic depth, in a region where the gas just got 50 percent more expensive.
The feedback loop nobody has connected: South Korea builds the ships.
Here is the connection I have not seen in a single piece of analysis from Fortune, Bloomberg, Tom's Hardware, or any of the publications that have covered the helium angle.
South Korea does not just make chips. It builds the ships that carry the gas that the rest of the world needs to replace Qatar's output.
South Korean shipyards, HD Hyundai Heavy Industries, Samsung Heavy Industries, and Hanwha Ocean, delivered 248 LNG carriers between 2021 and 2025, versus 48 from China. That is an 83.8 percent share of LNG carrier deliveries over the past five years, per BusinessKorea. Korean yards currently hold approximately two-thirds of the global LNG carrier orderbook by value, with LNG vessels accounting for 52 percent of their total backlog at $71.3 billion, per VesselsValue.
A single 174,000-cubic-metre LNG carrier costs $220 to 260 million at current pricing. Construction takes 30 to 36 months from steel cutting to delivery. Korean yards have orderbooks extending through 2028. New orders placed today face delivery in late 2028 or 2029.
There are circuit breakers. South Korea is restarting five nuclear reactors and easing coal restrictions. Shipbuilding is moderately energy-intensive, far less than steelmaking or semiconductor fabrication. There is currently an oversupply of LNG carriers, with approximately 60 idle ships providing buffer. Any disruption to shipyard output today would only affect deliveries in 2028 to 2029, given build timelines.
But the strategic risk is real. If the crisis extends for years, not months, Korean shipbuilding competitiveness erodes. Orders migrate to Chinese yards that are already capturing a growing share of the market. The 84 percent Korean dominance of LNG carrier deliveries begins to fracture. And that fracture arrives at exactly the moment when the global energy system needs maximum carrier capacity to compensate for the Qatari shortfall.
The timeline.
If the Hormuz closure and Qatar outage resolve within 60 days, the impact on semiconductor production is likely manageable. Stockpiles hold. Alternative helium sources partially compensate. Energy prices retreat. The market exhales.
If the outage extends to six months, the picture changes. Korean helium stockpiles thin. Fab utilisation may be reduced by 10 to 30 percent as helium is rationed to the most critical process steps. LNG carrier construction timelines face cost and supply chain pressure. The compounding effects begin.
If Qatar's three-to-five-year force majeure plays out in full, the global helium market restructures permanently. South Korea's semiconductor industry must find alternative supply for two-thirds of its helium at a time when there is no marginal global capacity to absorb the shift. Prices do not just spike. They reset to a new structural level.
The severity depends entirely on duration. And duration depends on a war that nobody in Silicon Valley can predict or control.
The close.
The AI boom was built on an assumption so fundamental that nobody thought to state it: that the physical world would cooperate. That gas would flow. That ships would sail. That straits would stay open. That the atoms would show up so the bits could do their work.
Three wars in three years severed three supply lines. Russia. The Strait of Hormuz. Ras Laffan. Each one tore a piece out of the infrastructure the modern world depends on. And each one revealed a dependency that was invisible until it broke.
The dependency that just broke runs from a gas field under the Persian Gulf through cryogenic separation plants in Qatar through helium containers on cargo ships through semiconductor fabs in Pyeongtaek and Icheon through memory packaging lines that produce HBM stacks through NVIDIA's module assembly through data centres in Virginia and Oregon.
One supply chain. One chokepoint. One war.
South Korea makes the memory AND builds the ships. It is the single most consequential industrial economy in this crisis, and its exposure is triple-stacked: oil, gas, helium. If it stumbles, the AI supply chain stumbles and the LNG carrier fleet stumbles simultaneously.
Nobody in Palo Alto is watching the Strait of Hormuz. They are watching token-per-second benchmarks and context window lengths and AGI timelines.
They should be watching the strait.
Because the atoms come before the bits. And the atoms are stuck.
