A call is growing in Taiwan for the government to audit its domestic chipmakers' 'mature-node' production activities in China. This move elevates what was once a commercial issue into a matter of national and industrial security, placing Taiwan in a complex position between the U.S. and China.
The core of the issue lies with mature-node or legacy chips. These are not the most advanced semiconductors but are the workhorses found in everyday electronics like cars, home appliances, and industrial equipment. China is aggressively expanding its production capacity for these chips with heavy government subsidies. This raises fears of a global supply glut, which could trigger a price war and severely hurt Taiwanese foundries like UMC, VIS, and PSMC, whose revenues heavily depend on these older technologies.
So, why is this happening now? Three key factors created a perfect storm. First, a domestic political stalemate in Taiwan is a major catalyst. With the 2026 budget review deadlocked, lawmakers are unable to use their usual fiscal oversight powers. Instead, they are turning to non-budgetary tools like demanding investigations and audits to address pressing strategic concerns. It's a way to exert influence when other avenues are blocked.
Second, the threat from China has become more tangible. Recent reports confirm massive new investments by Chinese foundries like Nexchip and Hua Hong. More importantly, Beijing is reportedly mandating that new fabs use at least 50% domestically-produced equipment. This policy not only speeds up China's expansion by reducing reliance on foreign tech but also signals a long-term, structural push for dominance.
Third, the broader geopolitical context of the U.S.-China tech rivalry is crucial. The United States has started to view China's dominance in legacy chips as a supply chain vulnerability and a national security risk. This international pressure encourages Taiwan to scrutinize its own economic ties with the mainland, especially in strategic sectors like semiconductors. For companies like TSMC and UMC, even a modest 5% drop in mature-node prices could translate into revenue losses of over a billion dollars, highlighting the significant financial stakes involved.
- Mature Node: Refers to older and larger semiconductor manufacturing processes, typically 28 nanometers (nm) and above. While not cutting-edge, they are essential for a vast range of electronic products.
- ASP (Average Selling Price): The average price at which a certain type of product or service is sold. A decline in ASP indicates increasing price competition.
- Foundry: A semiconductor manufacturing plant that makes chips for other companies. Taiwan's TSMC and UMC are leading global foundries.