Geopolitics › East Asia › Taiwan (Republic of China)
TSMC and Taiwan's chip dominance
Founded 1987· Resource or chokepoint
FactTreaties, membership, measured data, events.
Taiwan Semiconductor Manufacturing Company, the contract chipmaker that builds most of the world's most advanced processors.
See it on the Geopolitics map →The picture
Founded in 1987 by Morris Chang with Taiwan government backing, it pioneered the 'foundry' model: making chips that others design, for Apple, Nvidia, AMD and Qualcomm. It holds about two-thirds of the foundry market and the large majority of leading-edge output, and began mass-producing 2-nanometer chips in late 2025. Worth over $1 trillion, it makes up roughly 40% of Taiwan's stock index. It is building plants in Arizona, Japan and Germany, but its newest processes start in Taiwan.
Why it matters
AI, phones, cars and weapons depend on its chips, which makes Taiwan's security a global economic concern and TSMC itself a geopolitical asset.
Think of it like
Like one landlord owning nearly every Class A tower in a market: tenants have nowhere else to go, and any disaster there hits everyone.
Key facts and numbers
TSMC annual reports and earnings calls, market-share data from TrendForce and Counterpoint, and US Commerce Department statements.
What to watch
Whether its overseas fabs can match Taiwan's costs and yields, and how long its lead over Samsung and Intel lasts.
Connections (3)
▸TSMC and Taiwan's chip dominance anchors Semiconductors and chip export controlsFact
The relationship
TSMC makes most of the world's leading-edge chips, so export controls and chip diplomacy revolve around it. US rules bar it from making advanced chips for Huawei and other Chinese firms, and Washington pressed it to build in Arizona. Its concentration in Taiwan is widely seen as the chip world's biggest single point of failure.
Since when and why
Hsinchu and Tainan in Taiwan, plus Arizona; US rules cut off Huawei in 2020, and TSMC halted advanced AI-chip orders for Chinese clients in November 2024.
How we know
Market-share data from TrendForce and Counterpoint, US Commerce Department orders, TSMC filings, and 2024 teardowns that found TSMC-made dies in Huawei chips.
What to watch
How long TSMC's lead lasts, whether its US plants can make the newest chips at scale, and what would happen to its Taiwan fabs in a blockade.
▸TSMC and Taiwan's chip dominance is building fabs in United StatesFact
The relationship
Under US pressure, CHIPS Act grants and tariff threats, TSMC pledged about $165 billion for chip fabrication plants ('fabs') and advanced packaging in Arizona. Its first Phoenix fab makes advanced chips for Apple and Nvidia, though its newest processes still start in Taiwan.
Since when and why
Phoenix, Arizona; announced in 2020, production began in late 2024, and the pledge grew by $100 billion at a March 2025 White House event.
How we know
Company filings and announcements, a $6.6 billion CHIPS Act award from the Commerce Department, and production reports from the Arizona site.
What to watch
Whether Arizona's costs and labor shortages allow profitable leading-edge output, and whether moving fabs weakens Taiwan's 'silicon shield' against China.
▸TSMC and Taiwan's chip dominance is often called a 'silicon shield' for Taiwan (Republic of China)Disputed
The relationship
The 'silicon shield' idea holds that the world, China included, depends so heavily on TSMC's chips that an attack would be self-defeating and the US would feel bound to defend Taiwan. Critics reply that wars are not decided by economics, and that moving production abroad may weaken the shield.
Since when and why
Popularized by Craig Addison's 2001 book 'Silicon Shield'; it gained force as TSMC's lead widened in the 2010s and 2020s.
How solid?
Nothing conclusive: it is a theory about deterrence. TSMC's market share is documented; its deterrent effect is debated among analysts.
What to watch
Whether TSMC's Arizona and Japan plants erode the shield, and whether China would even value seizing fabs that depend on foreign inputs and staff.