This is How the Chips in Your Mobile Phone Are Made

Published on February 09, 2026 | Translated from Spanish
Schematic illustration showing the EUV photolithography process: a beam of extreme ultraviolet light strikes a silicon wafer coated with photosensitive material, engraving complex and microscopic circuit patterns.

How the Chips in Your Mobile Phone Are Manufactured

The circuits inside your device are microscopic-scale electrical highways. To build them, a technique called photolithography is used, similar to projecting a giant and detailed image onto a sensitive material. This method defines the tiny paths through which electricity travels. 🛣️

The Process of Etching with Light

First, a silicon wafer is covered with a layer that reacts to light. Then, it is illuminated with a specific pattern using ultraviolet light. The exposed areas harden, while the unilluminated ones are removed with a chemical, leaving a design ready to be etched into the silicon. It is a job that requires extreme precision.

Semiconductor chip manufacturing process

The Key: Using Finer Light

To draw increasingly smaller strokes, a light source with a minimal wavelength is needed. This is where extreme ultraviolet lithography (EUV) comes into play. It generates light so short that it is hard to conceive. To create it, a microscopic drop of tin is hit with a laser, producing a plasma that emits this special light. It is like drawing with a science fiction ray. ✨

EUV Process Details:
  • A high-power laser is used to excite tin droplets.
  • The resulting plasma emits extreme ultraviolet light.
  • This light is focused to project circuit patterns with nanometric detail.

The Machine That Makes It Possible

The equipment that executes this technology, manufactured by ASML, is one of the most sophisticated devices ever created. It integrates more than a hundred thousand components and its value is around 150 million dollars. Its size is comparable to that of a bus and it operates in a vibration-free and ultra-clean environment.

The choreography of light and metal at the atomic scale is what allows your mobile phone to work instantly.
ASML Machine Features:
  • Extreme complexity with more than 100,000 parts.
  • Requires a stabilized room, cleaner than an operating room.
  • Its operation ensures that processors are fast and efficient.

An Engineering Miracle in Your Pocket

Thinking that an everyday object is born from this ballet of atomic precision is fascinating. The next time you use your phone, remember the incredible manufacturing journey behind each chip. 📱