Taiwan's tier-2 semiconductor foundries, UMC and VIS, have begun raising their prices for mature process chips, signaling a major turning point in the market.
For the past few quarters, a price war, largely driven by Chinese competitors, has been the norm for these older-generation chips. However, three powerful forces have converged to shift the momentum. The first, and perhaps most significant, is the strategic pivot by TSMC, the industry giant. TSMC has publicly stated its intention to focus over 70-80% of its resources on cutting-edge nodes for AI and high-performance computing. This strategic concentration on the future effectively tightens the supply of mature chips, redirecting customers who need them toward other suppliers like UMC and VIS.
Secondly, geopolitical tensions are playing a crucial role. The United States government has initiated a Section 301 investigation into China's dominance in the legacy chip sector. This has made global companies wary of relying too heavily on Chinese supply chains. To mitigate this 'China risk', many are actively seeking non-Chinese alternatives and locking in long-term deals with Taiwanese foundries. This reduces customer churn and gives companies like UMC and VIS greater leverage to negotiate prices upwards.
Finally, the AI revolution is creating a surge in demand for a specific type of mature-process chip: power semiconductors. AI data centers are incredibly power-hungry and are increasingly switching to high-voltage direct current (HVDC) systems to improve efficiency. This transition requires a massive number of power management ICs (PMICs) and MOSFETs, which are primarily manufactured on 8-inch wafers using mature nodes. This steady, structural demand provides a solid foundation for foundries, keeping their production lines busy and justifying price increases.
Together, these factors—TSMC's strategic shift, geopolitical de-risking, and robust AI-driven demand—have brought the era of price cuts to an end. The market has already taken notice, with UMC's stock price surging nearly 30% in April, reflecting a clear investor belief that pricing power has firmly returned to Taiwan's tier-2 foundries.
- Foundry: A company that manufactures semiconductor chips for other 'fabless' companies that design them.
- Mature Process: Older, well-established semiconductor manufacturing technologies (e.g., 22nm and above), used for a wide variety of chips like power management, display drivers, and microcontrollers.
- PMIC (Power Management Integrated Circuit): A chip that manages power flow in electronic devices, crucial for efficiency and battery life.