EUV lithography

advancedwidespread

A chip manufacturing process that draws extremely dense, fine circuit patterns for the most advanced chips onto silicon using extremely short-wavelength ultraviolet light.

In plain terms

On the chip surface, billions of tiny switches, transistors, sit. These are not built individually but are 'photographed' onto the silicon wafer with light, roughly as photos were once projected from a negative onto paper. This is lithography.

The finer the drawing, the thinner the 'brush' needed. You cannot draw a hair-thin line with a thick felt-tip pen, and in the same way, light with a longer wavelength cannot be used to draw arbitrarily small patterns. EUV uses light with a wavelength of 13.5 nanometers, which is much shorter than the 193 nanometers of earlier machines, so it can produce much denser circuits.

This is why it became one of the bottlenecks of the AI era. The most powerful chips running large language models and AI agents are made on EUV machines, and only one company in the world manufactures such machines: the Dutch ASML.

How it works

Light generation: the machine fires tens of thousands of tiny tin droplets per second, and a high-power laser hits each one. The droplet turns into hot plasma, which emits the EUV light.
Vacuum and mirrors: both air and glass lenses absorb this light. Therefore, the entire process takes place in a vacuum, and instead of lenses, extremely smooth, multi-layered mirrors direct the beam.
Mask: light reflects off a patterned sheet, the mask. It contains the drawing of one layer of the circuit, this is the 'negative'.
Exposure: the mirror system shrinks the pattern and projects it onto a silicon wafer coated with light-sensitive photoresist. Where light hits it, the resist changes chemically.
Development and repetition: the exposed photoresist is dissolved, and the uncovered parts are etched or coated. This is repeated layer by layer until the chip is finished.

An everyday example

If you bought a high-end phone or laptop in recent years, its processor was most likely made with an EUV machine. The same applies to data center chips that respond when you ask an AI chatbot a question.

Who is affected

everyoneThe speed and cost of your phone, laptop, and AI services depend on how many top-tier chips can be manufactured with these machines.

bank customer, investorShares of chipmakers and machinery manufacturer ASML, as well as the return on AI investments, depend heavily on EUV capacity and export restrictions. → Money

industrial worker, engineerThe semiconductor industry and its supply chain (optics, vacuum technology, precision engineering) are building jobs in Europe on this technology. → Industry

entrepreneur, executiveChip shortages or geopolitical restrictions can appear in your costs through the prices of hardware and cloud AI services.

A common misconception

MythA '3-nanometer chip' means the components inside are 3 nanometers in size, and EUV draws lines of this scale.

In realityThe nanometer designation now serves more as a generational brand name, with actual dimensions being much larger. The wavelength of EUV light is also 13.5 nanometers.

Limits and risks

The entire world depends on a single manufacturer: if ASML or one of its key suppliers falters, it holds back the entire chip industry.
The price of a machine is several hundred million dollars (the latest High-NA types are even much higher), so only a few giants can afford high-tech manufacturing.
Political decisions restrict the export of EUV machines (for example, they cannot be shipped to China), making the technology a tool of great power competition.
Machines consume a lot of electricity, and much of the light is lost on the mirrors, making manufacturing expensive and energy-intensive.

Similar, but not the same

DUV lithography – The older deep ultraviolet process typically works with 193-nanometer light and lenses. It is cheaper and more widespread, but the densest circuits can only be produced with it through multiple exposures, more slowly and expensively.
chip manufacturing – Chip manufacturing is a full process consisting of hundreds of steps. EUV lithography is only the step that draws the pattern, and even then only for the finest layers; other layers are made on cheaper DUV machines.
GPU – The GPU is the actual chip on which AI runs; EUV is the manufacturing process used to produce the most advanced GPUs.

Related concepts

Broader

Semiconductor manufacturing, Lithography, AI infrastructure

Narrower

High-NA EUV, Fotomaszk

On the edge

GPU, AI accelerator chip, Moore's Law, chip export restriction, Data center

A brief history

Basic research began in the 1980s in Japan and the United States, but developing a reliable light source took decades. It has been used in mass production since 2018–2019: Samsung and TSMC were the first to adopt it, at the 7-nanometer generation.

Where things stand

By the end of 2026, it will be a foundational technology in the production of high-end phone, computer, and AI chips, as well as advanced memory chips. The next generation, High-NA EUV with even finer patterns, already has its first machines operating at chip manufacturers, and mass production is just beginning.

Status: 2026 November

Also known as

EUV · EUVL · EUV lithography · Extreme ultraviolet lithography · Extreme ultraviolet lithography · EUV lithography · extreme ultraviolet lithography · EUV lithography machine

Sources

This entry was machine-edited and has undergone machine expert review; the “In the news” section updates automatically from Agent Age stories.