Contract memory foundry work, UMC’s stock price rises 30% in five days! The industry warns of a “three-short” bottleneck: short-term risks of getting stuck

The ongoing 2D NAND flash memory supply shortage crisis continues to worsen, and reports from the market suggest that United Microelectronics (2303) may take over SLC and MLC Flash foundry wafer orders. The news has driven the stock price up nearly 30% in just five trading days. However, industry insiders told 《DIGITIMES》 that United Microelectronics faces a “three shortages” predicament—talent, technology, and equipment—and may run into a bottleneck in the short term.

2D NAND faces a severe shortage—could United Microelectronics take over foundry orders?

As Samsung (Samsung), Kioxia (Kioxia), and other international memory giants have successively shifted resources and concentrated them on 3D NAND, the supply gap for 2D NAND has quickly widened. This has pushed up prices of older SLC and MLC NAND process products at a rapid pace; the price increases for some SKUs are nearly tenfold, with the growth rate outpacing DRAM. Downstream players also revealed that MLC NAND quotations have been raised by 30% since just April.

(Memory price rally cooling off? Institutions estimate the Q2 increase narrows to 30%, and further cools in the second half)

Against this backdrop, the industry has begun seeking alternative supply sources. Taiwan’s leading semiconductor foundry company, United Microelectronics, has become a “memory-themed stock” that the market is chasing, because it has some idle production capacity. Outside reports further say that some Asian customers have proactively contacted United Microelectronics to explore the possibility of taking on SLC and MLC Flash foundry wafer production.

United Microelectronics (2303) stock closed today at $76.90, up 27.11% over five days

As the rumors spread rapidly, United Microelectronics’ stock price surged more than 27% within five trading days; however, a United Microelectronics spokesperson did not respond to this.

United Microelectronics faces three major gaps—“talent, technology, and equipment”—and the industry admits: no solution in the short term

However, multiple industry insiders privately told 《DIGITIMES》 that United Microelectronics’ prospects of moving into 2D NAND foundry work are far more difficult than the market imagines.

Talent gap: 2D NAND engineers have “left the building”

First, most of the veteran engineers who were responsible for tuning 2D NAND process equipment have either retired or left. Those who remain have all been transferred to 3D NAND mass production positions. At present, NAND makers are fully racing to develop 3D NAND in order to capture the AI server market; manpower has long been stretched thin, leaving no slack to provide technical team support for migrating 2D NAND processes.

Technical capability: United Microelectronics’ memory development capability shows a serious gap

Next, although United Microelectronics carried out memory-related R&D years ago, its core technical direction has long shifted away from the memory field. Re-entering would not only require large-scale resources; rebuilding capabilities for yield optimization and process tuning would also take a considerable amount of time. If United Microelectronics can only provide production capacity but cannot support process development for customers on its own, its actual contribution to profits would be quite limited.

Equipment acquisition: older-generation equipment is almost impossible to obtain

Finally, when major manufacturers upgrade to 3D NAND production lines, older-generation equipment has already been sold off or dismantled. The secondhand market is almost unable to find what is needed; even if equipment can be found, it is equally difficult to get maintenance parts and technical personnel. Kioxia previously also said publicly that shutting down 2D NAND production was not due to AI capacity crowding it out; rather, it was due to severely aged old equipment, excessively high maintenance costs, and related issues.

If United Microelectronics chooses to purchase entirely new equipment to rebuild the production line, it is estimated to take one to two years, and the yield-rebuilding process is full of uncertainty—meaning the investment payback risk is extremely high.

United Microelectronics adjusts wafer price upward; the 8-inch line could see an increase of up to 15% in the second half

In addition, United Microelectronics has recently officially issued price-increase notices to customers and business partners, confirming that it will raise wafer foundry quotation starting in the second half of 2026. The company said that, starting from the first half of 2026, demand across multiple application areas—including communications, industrial, consumer electronics, and AI-related fields—will continue to be strong. Combined with comprehensive increases in raw material, energy, and logistics costs, it is indeed necessary to raise prices.

Supply-chain players said that both the 8-inch and 12-inch product lines are within the scope of this round of price increases. Based on a production cycle of about 3.5 months, April orders will be the first to apply the new prices: the 8-inch wafer production line has a relatively higher increase of about 10% to 15%; the 12-inch production line (including processes such as 80nm, 55nm, 40nm) has an estimated increase of about 5% to 10%, and the increases will be implemented in tiers according to each customer’s shipment volumes.

Industry observers noted that this round of price hikes is mainly intended to make up for the profit shortfall caused by past price cuts in mature processes. IC customers with long-term contracts (LTA) are less affected, and the increase is expected to be gradually passed on to downstream customers.

The gap between market expectations and reality: near-term risks should not be ignored

Now, although United Microelectronics’ idea of taking on 2D NAND foundry work looks promising, the three major obstacles—talent gap, technical gap, and equipment shortages—are all intertwined. In the short term, it may end up running into a bottleneck. In a market environment where the supply gap continues to expand and quotations continue to rise, United Microelectronics’ rapid stock surge reflects more the market’s enthusiasm for the theme than changes in fundamentals.

Chain-news reminds investors that when following volatile themes such as memory, they still need to prudently assess the risk of the gap between expectations and reality.

This article: Taking over memory foundry—United Microelectronics’ stock jumps 30% in five days! Industry warns of a “three-shortage” bottleneck: likely to get stuck in the short term; earliest appears at Chain News ABMedia.