The Global Supply Chain

The phone in your pocket likely contains a chip that was designed in one country, built on silicon wafers manufactured in another, patterned using a lithography machine made in a third, fabricated in a fourth, and packaged and tested in a fifth — before the finished chip ever reached the factory that assembled your actual phone. No other major industry is quite this globally distributed, and understanding why helps explain both how remarkable the chip industry is and why it shows up so often in geopolitical news.

Why one chip crosses so many borders

Each stage of making a chip demands a different, extremely specialized kind of expertise, and over the decades those specialties have clustered in different parts of the world rather than all developing everywhere at once.

Design (the RTL-to-GDSII flow) is talent- and software-intensive, drawing on EDA tools concentrated among a couple of major vendors, with fabless design companies spread across the United States, Taiwan, and elsewhere.
Lithography equipment, especially cutting-edge EUV machines, is produced almost entirely by one company, headquartered in the Netherlands, whose supply chain itself pulls in specialized optics and laser components from other countries.
Wafer fabrication — the actual etching, deposition, and doping that builds transistors on a wafer — is concentrated in a small number of countries and companies capable of running leading-edge fabs, particularly Taiwan, South Korea, and the United States.
Assembly, packaging, and testing (turning finished wafers into usable chip packages) has historically clustered in parts of Southeast Asia and China, where large-scale, labor-intensive precision assembly developed strong regional expertise.

🧩 Think of it like… making a single dish where the flour comes from one country, the specific spice you need only grows in another, the pot it's cooked in is forged by artisans in a third, and the chefs skilled enough to plate it work in a fourth. No one place has every ingredient and every skill, so the meal quite literally cannot exist without cooperation across all of them. A modern chip is like that dish, except the "spice that only grows in one place" might be a machine only one company on Earth currently knows how to build.

Tracing a chip’s journey

    flowchart LR
    A["Design<br/>(fabless company,<br/>using EDA software)"] --> B["Lithography & fab equipment<br/>(specialized toolmakers)"]
    B --> C["Wafer fabrication<br/>(foundry)"]
    C --> D["Packaging & testing<br/>(assembly & test specialists)"]
    D --> E["Finished chip<br/>ships to device maker"]
    E --> F["Assembled product<br/>(phone, car, laptop...)"]

At every arrow in that diagram, the partially finished chip (or the raw materials, or the equipment itself) is likely to physically cross at least one international border — sometimes several times, if a wafer is fabricated in one country and shipped elsewhere for packaging before returning to yet another country for final assembly into a product.

Why this makes chips geopolitically significant

Because expertise concentrated rather than spreading evenly, a handful of specific companies and regions became difficult or impossible to fully replace on short notice. If the equipment maker that is the world’s sole source of EUV lithography machines can’t ship, or a region responsible for a large share of leading-edge fabrication capacity faces disruption, the effects ripple through nearly every downstream industry — cars, phones, data centers, appliances — because so many products ultimately depend on chips from that same concentrated set of sources.

This concentration is a natural result of specialization and decades of accumulated, hard-to-replicate expertise — not necessarily anyone’s deliberate strategy. But it does mean that semiconductor manufacturing capacity, and the equipment that enables it, has become a matter of national economic and security policy in multiple countries, motivating large public investments aimed at diversifying where chips are designed and manufactured.

As of the mid-2020s, several governments have launched major incentive programs aimed at building or expanding domestic chip manufacturing capacity, partly in response to this concentration risk. Given how quickly this landscape shifts, treat any specific company or country’s current share of the market as a mid-2020s snapshot rather than a permanent fact.

A genuinely unusual supply chain

Few other products require this many distinct, hard-to-replicate specialties to combine successfully. A car, by comparison, involves plenty of global sourcing too, but no single component in a typical car depends on a supply chain as narrow — down to essentially one company for a critical tool — as leading-edge chip manufacturing does for EUV lithography. That narrowness is precisely what makes the chip supply chain both a triumph of specialization (nobody could do all of this alone) and a genuine vulnerability (a disruption to a small number of critical links can have outsized global effects).

Key takeaways

Chip manufacturing is split across design, equipment-making, fabrication, and packaging/testing — stages that have clustered in different parts of the world due to specialized, hard-to-replicate expertise.
A single finished chip typically crosses multiple international borders before reaching a consumer product.
This concentration, especially in critical equipment like EUV lithography tools, makes semiconductor supply chains unusually exposed to disruption compared to most other industries.
Because so many downstream industries depend on chips, semiconductor supply chains have become a significant topic in national economic and security policy.
See Major Players Map for the companies at each stage, and EUV Lithography for why that particular technology is such a concentrated chokepoint.

Where Chips Go