Why Taiwan and South Korea dominate the chip supply chain

Almost every phone, car, data centre and home appliance on the planet depends on semiconductors — and the most advanced of them are made by a remarkably small number of companies concentrated in Taiwan and South Korea. Understanding how that happened explains a surprising amount about modern technology, trade and geopolitics. This explainer breaks down the foundry model, why leadership is so concentrated, and why governments now treat chips as a strategic priority.

How the chip industry is structured

A modern semiconductor passes through three broad stages: design, manufacturing (fabrication), and assembly, testing and packaging. Decades ago, most companies tried to do all of this themselves. Over time the industry specialised, and two business models emerged:

• Fabless companies design chips but own no factories. They focus on architecture and intellectual property.
• Foundries manufacture chips designed by others, for a fee, running enormously expensive and precise factories known as fabs.

The foundry breakthrough

Taiwan’s great insight was the pure-play foundry: a factory that builds other companies’ designs and does not compete with them by selling its own branded chips. That removed a conflict of interest and unlocked a wave of innovation, because a small design startup anywhere in the world could suddenly turn a blueprint into cutting-edge silicon without spending tens of billions on a plant. The foundry took on the capital risk; the designer focused on ideas.

Why leadership became so concentrated

Chipmaking at the frontier is one of the most demanding manufacturing challenges humans have ever attempted. Several forces push the industry toward a few dominant players:

1. Staggering capital costs. A single leading-edge fab can cost well over US$20 billion to build and equip.
2. Relentless complexity. Each new generation of chips — each smaller ‘node’ — is harder and more expensive than the last.
3. Compounding advantage. The leaders attract the most customers, whose orders fund the next round of research, which produces better processes, which win still more customers.
4. Scarce expertise. The engineering know-how to run these processes reliably is built up over decades and cannot be copied quickly.

The result is a virtuous circle for whoever is ahead — and a very high wall for anyone trying to catch up. Advanced logic chips are dominated by Taiwan, while South Korea leads in memory chips, the components that store data in everything from phones to servers.

Why chips matter far beyond technology

Because so much of the world’s most advanced manufacturing runs through a small geographic area, semiconductors have become a strategic pressure point. A disruption — whether from a natural disaster, an accident or geopolitical tension — could ripple through global industries that depend on a steady chip supply, including the carmakers and electronics firms that drive benchmarks like South Korea’s KOSPI (see our guide to Asia’s major stock indices).

In response, governments in the United States, Europe, Japan and India have launched large programmes to build domestic chip capacity, while the existing leaders expand overseas to diversify where they manufacture. This is one of the defining industrial contests of the era — and the digital infrastructure it feeds, from data centres to the undersea cables that carry the internet, is increasingly central to national power.

The challenges ahead

Even the leaders face pressure. Building new fabs in higher-cost countries is expensive and slow, skilled engineers are in short supply worldwide, and demand can swing sharply between shortage and glut. How the incumbents manage those cycles — and whether newcomers can carve out a niche in less advanced or specialised chips — will shape the next chapter of the industry.

The rest of the supply chain

Foundries and memory makers get the headlines, but they sit on top of a wider ecosystem that is just as concentrated. Making advanced chips requires extraordinarily precise manufacturing equipment — including the lithography machines that print circuit patterns onto silicon — as well as ultra-pure specialty materials and chemicals, many of which come from a small number of suppliers, notably in Japan, Europe and the United States. After fabrication, chips still need assembly, testing and packaging, a stage that is itself becoming more sophisticated and strategically important.

This means ‘making a chip’ is really a global relay race. A design might originate in one country, be manufactured in Taiwan or South Korea using tools and materials from several others, and be packaged elsewhere again. Disruption at any single point can slow the whole chain — which is why resilience, not just raw capacity, has become the industry’s watchword.

What it means for consumers and investors

For ordinary buyers, chip supply shapes the price and availability of everything from phones and laptops to cars and appliances; shortages can delay products and push up prices, while gluts do the opposite. For investors, the semiconductor cycle is one of the most important rhythms in technology, and it feeds directly into export-heavy markets such as South Korea’s — see our guide to Asia’s stock indices.

Frequently asked questions

Why is Taiwan so important for semiconductors?

Taiwan pioneered the pure-play foundry model and is home to the manufacturing of many of the world’s most advanced logic chips. The capital, expertise and scale involved make that leadership very hard to replicate quickly.

What is the difference between a fabless company and a foundry?

A fabless company designs chips but does not manufacture them, while a foundry manufactures chips designed by other companies. The two models let designers innovate without owning multi-billion-dollar factories.

What does South Korea specialise in?

South Korea is a global leader in memory chips — the components that store data in devices ranging from smartphones to data-centre servers — in addition to its broader electronics manufacturing.

Why are governments spending so much on chip factories?

Because advanced chipmaking is concentrated in a few places, governments see domestic capacity as essential for economic and national security, and are offering large incentives to attract fabs.

The bottom line

The dominance of Taiwan and South Korea in semiconductors is the product of a specialised business model, enormous capital barriers and decades of compounding expertise. That concentration delivers the advanced chips the world runs on — and explains why securing chip supply has become one of the most important economic contests of our time.