The biggest misconception about AI
Few people realize that much of our technological civilization, including advanced AI, rests on something that sounds almost impossible:
printing chips with light. But not with ordinary light.
Visible light is far too blunt to print the smallest structures demanded by today’s most advanced processors.
And that leaves the technology industry facing a question as simple as it is brutal: Can we keep shrinking chips fast enough to build all the technological wonders now being promised?
Because the process required to do it is so absurd that it sounds like the opening scene of a science-fiction movie.
The adventure, however, begins humbly, with one of the most ordinary elements in the periodic table:
Yep. Not some exotic substance harvested from a meteorite. Not a rare element available only to governments.
Nope.
Just a common, inexpensive metal, melted into a droplet barely a third the width of a human hair.
Then the real madness begins. Good luck with that. Twice.
First, you need a laser pulse to strike a single tin droplet and flatten it into a tiny disk.
Then, a fraction of a microsecond later, you must strike that same microscopic droplet with a second, vastly more powerful pulse.
Before a single second has passed, tens of thousands of droplets have already met the same fate. Droplet after droplet, the swarm ignites, each tiny sphere erupting into incandescent plasma at around 220 thousand °C, nearly forty times hotter than the surface of the Sun.
For one fleeting instant, you have created a tiny artificial star inside a laboratory. And from that star comes the prize you were searching for:
extreme-ultraviolet light EUV
The light capable of printing the smallest structures inside the most advanced chips on Earth.
There is only one problem.
The moment EUV light touches almost anything, it disappears.
Air absorbs it. Glass absorbs it. Ordinary lenses are useless.
So, if you want to use that light to print the most advanced AI chips on Earth, you must guide it with mirrors polished to a level of perfection almost impossible to comprehend.
Here is one way to picture it:
If one of those mirrors were enlarged to the size of Germany, its tallest imperfection would still be less than a millimetre high.
But even those mirrors cannot save all of it.
Every reflection steals part of the beam. Bounce after bounce, most of the light vanishes.
So how the hell do you carry what remains through the machine and deliver it onto the silicon wafer where the world’s most advanced AI chips will be printed?
There is only one possible route.
The entire journey must take place inside a vacuum, using that sequence of unimaginable precision polished mirrors. What little survives is finally focused onto a silicon wafer moving at extraordinary speed, where it prints patterns only a few nanometres wide.
And somehow, this entire chain of events must repeat fifty thousand times every second. Hour after hour. Day after day. Without drifting, missing, or breaking.
By now, disbelief is a perfectly reasonable reaction. But you are not reading a science-fiction tale. Such a machine exists.
So I am not going to ask you to imagine the rest. I am going to take you inside the real machine.
The latest High-NA EUV systems are designed to print features at a resolution of roughly eight nanometres in a single exposure. But that creates a serious problem, the kind engineers call a single point of failure: only one company on Earth can build them.
And that company is neither American nor Chinese.
In the animations ahead, you will watch the tin droplet, the laser pulses, the birth of the plasma, the impossible journey of the EUV light, and its final arrival at the silicon wafer, all unfolding inside a machine almost harder to believe than the science fiction it resembles.
Perhaps the strangest part is that this machine is controlled by neither the United States nor China.
At least, not yet.
You Were Told the Wrong Story About the AI War
You were told the AI race would be won with better models.
That is only half true. Models require chips. And the most advanced chips require factories. So the conclusion seems obvious: the factories are the prize.
Forget Silicon Valley for a moment. It is not the main character in this part of the story.
Move instead to Taiwan, the small island where many of the world’s most advanced processors are manufactured. And now the question becomes unavoidable:
If Taiwan sits at the heart of modern technology, and especially advanced AI, why has China not simply seized the island and claimed the greatest prize in the industry?
Because factories this delicate cannot simply be conquered. They depend on skilled engineers, uninterrupted supplies, specialized software, spare parts, and machines that cannot be replaced overnight.
Break that chain, and the factory stops being a prize. It becomes an empty shell with a Chinese flag hanging over it.
But there is a deeper problem.
Even Taiwan’s most advanced fabs cannot build the future alone. Their survival depends on a technological frontier that keeps moving, and on machines they do not manufacture themselves.
One machine in particular. A machine so extraordinarily difficult to build that, despite decades of effort, only one company on Earth has mastered it.
Control that machine, and you gain leverage over every frontier model, every advanced GPU, every cutting-edge processor, and every company trying to build the next generation of intelligence.
But neither Washington nor Beijing fully controls it.
Both depend on a machine built in a small European country that many people would struggle to locate on a blank world map.
And that is where our story becomes a tech thriller.
One Machine to Rule Them All
How special can one machine really be?
Look around. The world is already drowning in silicon.
Every day, factories pour out millions of processors, memory chips, GPUs, smartphones, laptops and servers. An endless metallic bloodstream feeding modern civilization.
So it is easy to assume that these factories are where the real power lies. They are not. They are the stage.
The machine you are about to meet is the hidden mechanism beneath it.
Because no matter how vast the factory, how brilliant the engineers or how many billions have been poured into the building, none of it can produce the next generation of chips alone.
For that, the entire industry depends on one machine that makes the making of chips possible.
That distinction is where the story changes.
Because once you understand what happens inside it, the rest of the AI race begins to look almost secondary.
And the crucial thing is not any one component. You have already met many of them in the opening of this article: the lasers, the molten tin, the vacuum, the mirrors, the wafer racing beneath the light.
Each is only one piece of the puzzle. The underlying principles are known, and many of the parts come from specialist suppliers.
The real miracle is not any single component. It is the choreography.
Every laser pulse, every mirror, every moving stage, every sensor and every control system must perform its part at precisely the right moment.
A mistimed pulse, a tiny thermal expansion, a vibration only a few nanometres wide, or a sub-nanometre misalignment can spoil the pattern being printed.
They must all enter at the right moment, hand the process to the next system, and never break the chain.
But the real challenge is not merely making today’s machine work.
It is leaving enough room for tomorrow’s machine to go even further.
Every new generation must print structures even smaller than the last, squeezing more transistors into the same piece of silicon, continuing the decades-long trend known as Moore’s law.
And sometimes, after decades spent mastering lasers, materials and the physical limits of lithography, the breakthrough arrives in a form that sounds almost absurdly modest: not as a new light source, a new substance or a new law of nature, but simply as a slightly wider cone of light.
That tiny change is enough to carve dramatically smaller structures into silicon, allowing billions more transistors to occupy the same space
And there it is.
The machine that makes everything you have seen so far possible.
It carries the cold, almost deliberately unremarkable name ASML TWINSCAN EXE:5200B — a label that gives no hint of the extraordinary role it plays in the technological life of our civilization.
And from the outside, the deception continues.
The magic is hidden inside, where all those components finally become one system.
That is the achievement nobody else has reproduced. Not the laser alone. Not the mirrors. Not the vacuum. Not the moving stage. The real wonder is how one Dutch company, ASML, has made them all work together continuously, reliably, and at the limits of physics.
So let us step inside.
By now, you already know the light. You have watched it emerge from tin plasma and survive its journey through the mirrors.
Now it reaches the moving wafer.
Pattern by pattern, layer by layer, a microscopic city begins to rise from the silicon. What eventually emerges is a finished chip: a nano-city printed with light, ready to become the next frontier AI processor
And all of this wonder unfolds inside the womb of the machine: a miniature universe sealed from the outside world, filled with ultra-high vacuum and kept around a thousand times cleaner than an operating room. In that isolated world, where even a single speck of dust becomes an enemy, the future of advanced AI is printed with light.
Ecce machina!
This is the narrowest bottleneck in the entire AI economy.
If OpenAI disappeared tomorrow, another company would eventually replace it.
If Nvidia disappeared tomorrow, AMD, Google, Amazon, or dozens of startups would race to fill the gap.
Even if one of the world’s largest chip manufacturers vanished, others could slowly absorb its production.
But remove this machine…
…and the entire frontier of artificial intelligence stops moving forward.
References and Further Reading
ASML. TWINSCAN EXE:5200B: High-NA EUV Lithography. Official specifications for ASML’s second-generation 0.55-NA system, including its 8-nanometre resolution, higher imaging contrast and intended use in sub-2-nanometre logic production.
ASML: TWINSCAN EXE:5200BASML. Light and Lasers: Lithography Principles. Explanation of the molten-tin droplets, dual laser pulses, plasma formation and the generation of EUV light, with the process repeated 50,000 times per second.
ASML: Light and LasersASML. 2025 Annual Report.ASML’s latest annual account of its High-NA EUV programme, commercial progress, technology roadmap, supply network and delivery of the full-specification EXE:5200B.
ASML 2025 Annual ReportIntel. High-NA EUV at Intel. Intel’s overview of its High-NA installation, including the comparison with a double-decker bus and blue whale, and the tin plasma temperature of nearly 220 thousand °C.
Intel: High-NA EUV Press KitImec. Imec Receives the World’s Most Advanced High-NA EUV System. 18 March 2026. Covers the installation of an EXE:5200 system and its role in developing future generations of advanced memory and computing chips.
imec: EXE:5200 High-NA EUV InstallationASML. Five Things You Should Know About High-NA EUV Lithography. 25 January 2024. An accessible explanation of the 0.55 numerical aperture, anamorphic optics, improved resolution and engineering challenges behind the EXE platform.
ASML: Five Things About High-NA EUVZEISS Semiconductor Manufacturing Technology. EUV Lithography and Technology. Describes why EUV requires a vacuum and reflective optics, how the projection system works, and why the mirrors rank among the most precise objects ever manufactured.
ZEISS: EUV Lithography and Technology