SEOUL, August 14 (AJP) - China's heavily government-backed chipmakers are breaking into the once-exclusive global memory club, with Yangtze Memory Technologies Co. (YMTC) vaulting into the world's top three NAND flash suppliers for the first time.
But just as China closes the gap in manufacturing scale, artificial intelligence is moving the industry's profit pool toward a harder target.
YMTC captured 14 percent of global NAND bit shipments in the second quarter, overtaking Japan's Kioxia to rank behind Samsung Electronics at 25 percent and SK hynix at 22 percent, according to Counterpoint Research.
The ranking marks a striking ascent for a company founded only a decade ago and offers some of the clearest evidence yet that China's push for semiconductor self-sufficiency is reshaping a memory market long dominated by a small group of South Korean, Japanese and U.S. suppliers.
Much as ChangXin Memory Technologies (CXMT) has broken into the DRAM market, YMTC has achieved scale that is yet to translate into meaningful numbers on the top and bottom lines.
It ranked third in NAND shipments during the quarter but only fifth in revenue, behind Kioxia and Micron Technology, as its product mix remained concentrated in lower-priced consumer applications rather than high-value data-center storage, Counterpoint said.
That distinction matters more than ever.
Enterprise solid-state drives, or eSSDs, accounted for 48 percent of global NAND bits shipped in the second quarter, up sharply from 26 percent a year earlier. Counterpoint expects their share to exceed half of all NAND shipments by the end of this year.
The shift reflects the widening deployment of AI from model training toward inference, where enormous volumes of data must be stored and retrieved rapidly and with low power consumption.
That is turning storage — long overshadowed by graphics processors and high-bandwidth memory in the AI investment boom — into an increasingly important part of data-center infrastructure.
For Samsung and SK hynix, it creates an unusual competitive dynamic.
YMTC's rapid expansion threatens to intensify competition in mainstream NAND, where additional Chinese supply could eventually pressure market share and pricing. At the same time, the industry's most valuable demand is migrating toward enterprise products, giving the Korean companies another layer of defense.
Lee Jong-hwan, a professor of system semiconductor engineering at Sangmyung University, said YMTC's rise should not be dismissed as a temporary phenomenon driven simply by price competition.
"Chinese memory companies are different from what they used to be," Lee said. "Their technological capabilities have improved considerably, and they are investing heavily in research and development at a rapid pace to compete with Samsung and SK hynix."
Samsung has been expanding high-capacity enterprise SSD products for AI servers, while SK hynix has built a substantial data-center storage business through Solidigm, the U.S.-based company created after its acquisition of Intel's NAND and SSD operations.
SK hynix's share in the second quarter was helped by a roughly 40 percent quarter-on-quarter increase in Solidigm's bit shipments, according to Counterpoint.
YMTC increased shipments 22 percent from a year earlier and 5 percent from the previous quarter as shortages emerged in parts of the consumer market while established suppliers increasingly favored higher-margin products.
China, in other words, is catching up fastest where the market has been.
The harder question is whether it can catch up where the market is going.
For YMTC, sustaining its new ranking will increasingly require competing in enterprise SSDs, where it faces higher barriers than in supplying NAND for smartphones and personal computers.
Data-center customers demand endurance, reliability, power efficiency and sustained performance, while products typically undergo extensive qualification before they can be deployed across servers at scale.
Samsung, SK hynix and Micron also have long-established relationships with global cloud and server customers that cannot be replicated simply by adding fabrication capacity.
Like other Chinese names, YMTC has been on the U.S. Commerce Department's Entity List since December 2022, subjecting exports, reexports and transfers of covered U.S. technology to stringent licensing requirements.
Those restrictions have constrained its access to certain advanced chipmaking technologies and added another commercial and compliance hurdle as it seeks to expand internationally.
Washington's broader semiconductor controls have simultaneously reinforced Beijing's determination to build a more self-sufficient chip industry, turning memory into one of the central battlegrounds in China's technology push.
Still, the restrictions have not stopped YMTC's technological or capacity advance.
The company is mass-producing 267-layer 3D NAND and developing technology with more than 300 layers using its Xtacking architecture, while continuing to expand supply to Chinese device makers, according to Counterpoint.
YMTC has also begun moving toward enterprise SSDs, the research firm said, with plans to increase their share in its product mix during the second half.
The stakes are particularly high because NAND has become the second front of China's challenge to the global memory hierarchy.
CXMT has already emerged as the No. 4 DRAM player and made a blockbuster Shanghai debut on July 27 after raising 57.92 billion yuan ($8.6 billion) in the biggest semiconductor IPO ever on mainland China. Its shares surged 466 percent on their first trading day.
YMTC is set to follow the same path. The NAND maker formally began the process for a listing on Shanghai's technology-focused STAR Market in May, potentially opening another source of capital for capacity expansion and next-generation development. State-backed entities, including China's national semiconductor funds and local government investors, are among its major shareholders.
Together, CXMT and YMTC represent something the global memory industry has not previously confronted at this scale: Chinese challengers gaining ground simultaneously in both of its major markets.
The threat is not yet symmetrical.
In DRAM, Samsung and SK hynix retain a formidable lead in high-bandwidth memory, or HBM, the premium memory stacked alongside AI accelerators. In NAND, the Korean companies similarly hold stronger positions in high-value enterprise storage even as YMTC closes the shipment gap.
But memory-chip history shows why scale itself matters.
The industry is notoriously cyclical. Relatively modest changes in supply can produce sharp swings in prices once inventories start accumulating. A well-funded Chinese supplier capable of steadily adding capacity could therefore influence the broader market long before it catches the incumbents at the technological frontier.
Lee said that is precisely where YMTC's growing scale could become a more immediate concern for the Korean memory makers, even before it closes the technology gap.
"The larger their share becomes, the greater the possibility that prices will come down," Lee said. "Samsung and SK hynix will have to keep investing and pursuing research and development to maintain the gap."
For Samsung and SK hynix, the challenge is consequently no longer simply to keep YMTC behind them in shipment rankings.
As with smartphones, Korean chipmakers are likely to separate themselves by concentrating on the premium market — HBM in DRAM and enterprise SSDs in NAND.
YMTC has crossed the first barrier, and its ability to cross the next will determine if China's NAND rise remains largely a volume story — or becomes a direct challenge to the memory industry's most profitable markets.
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