The Mature-Node Flood

Barred from the leading edge, China changed the subject. Rather than fight for the newest nodes it cannot fully make, it is flooding the world with the older ones it can, the unglamorous 28-nanometre-and-larger chips inside cars, appliances, industrial gear and power systems.

The scale is deliberate. China’s share of global mature-node capacity is projected to reach roughly 28% by the end of 2025 and near 39% by 2027 on one tracker’s numbers; on a narrower 28nm-only measure another puts it above 31% by 2027.^[1][2] (The figures diverge by definition, all-mature versus 28nm-only, capacity versus output, so any single number should be read with its source.) The European Commission counted at least 32 large Chinese fabs planned or under construction, mostly at these nodes.^[3]

The logic, and the backlash

The strategy is rational. Mature nodes are not restricted by export controls, they are profitable in autos and industrial markets, and China can build them with the DUV tools it already has, funded partly by the roughly $95 billion “Big Fund.”^[1] The result is a looming glut, and the West has noticed. In December 2024 the US Trade Representative opened a Section 301 investigation into China’s “foundational” semiconductors, citing non-market practices and supply-chain risk; the EU launched its own dependency review months earlier.^[4][3]

Locked out of the newest chips, China is aiming to own the oldest ones, the silicon in your car and your fridge.

The strategic elegance of the mature-node play is that it turns the sanctions regime’s own logic against it. By restricting only the leading edge, the controls implicitly declared everything below it fair game — and that is the ground China can build on today with the DUV tools it already owns. The result is capacity aimed at the least glamorous, most ubiquitous silicon in the economy, the chips no headline tracks but every car, appliance and power system needs. That is real leverage: a commodity glut pressures incumbents’ margins, and dependence on those humble components is harder for a rival economy to unwind than dependence on a single flagship processor.

The signal underneath

The mature-node flood is the more consequential half of China’s chip strategy precisely because it is achievable today. It pressures the margins of Western and Taiwanese legacy-chip makers, and it hands Beijing leverage over the humble components a modern economy cannot function without. For investors the signal is a coming price war in commodity silicon, a risk to incumbents’ legacy revenue, and a trade-policy flashpoint to watch. The leading edge gets the headlines; the trailing edge is where China’s capacity actually lands.