China's CXMT targets 30% DRAM market share by 2030 via a sixth mega-fab, but faces advanced chipmaking tool restrictions.

Following its $8.6 billion initial public offering in July, ChangXin Memory Technologies (CXMT) is considering building its sixth DRAM fab in China to boost memory output in the coming years. If all announced projects proceed as planned, the company's production capacity could more than double in the mid-term future. Investment banker Dan Niles believes China could capture 30% of the DRAM market by 2030.

CXMT currently operates three 300-mm DRAM fabs: two near Hefei and one in Beijing's Yizhuang district. Each fab is capable of processing around 100,000 wafers per month, putting the company's total output at approximately 300,000 wafer starts per month (WSPM). The company is pursuing aggressive expansion, currently building additional fabs near Shanghai and Hefei. The sixth fab will reportedly be located in Beijing's Yizhuang area, adjacent to its existing facility. Once these projects are fully operational, the company's total manufacturing capacity could exceed 600,000 WSPM, doubling its current output. Researchers from Citrini Research model that CXMT could exit 2026 with a capacity of 350,000 WSPM—just 25,000 WSPM shy of Micron's end-of-year target. By 2030, Citrini projects CXMT will have production capacity of around 950,000 WSPM.

Building three major DRAM fabs is a significant undertaking, both financially and operationally. Chinese fab construction typically relies on support from local and federal governments under the "Hefei model," which aims to transform cities into economic centers through high-risk semiconductor projects. Shanghai and Beijing have both provided financial assistance to attract CXMT to their regions. CXMT's existing Beijing fab, operated by Changxin Jidian, received backing from E-Town Capital and Beijing E-Town Technology, both affiliated with the Yizhuang development zone. The district has evolved into a major semiconductor hub, hosting CXMT, SMIC, Naura Technology, and Xiaomi.

The proposed sixth fab would be located in Beijing's Yizhuang district, roughly 20 kilometers southeast of the city center. The planned production capacity and total capital investment have not been disclosed, though a leading-edge DRAM fab typically costs well over $10 billion. Sources indicate CXMT is seeking at least 60 million yuan ($8.9 million) in financial support from the Beijing Economic-Technological Development Area, with state-owned technology companies expressing interest in participating. Discussions remain preliminary, and neither the overall size nor financing structure has been finalized.

The timing is favorable for CXMT. The company can sell all of its DRAM output at competitive prices to domestic PC and server makers including Lenovo, as well as global brands such as Micron, Samsung, and SK hynix, which prioritize shipments to the AI sector. Apple, Dell, and HP have all qualified CXMT's memory and are ready to deploy it in devices sold in China, while Acer and Asus have already begun using DRAM from the Chinese maker. Long-term supply contracts with leading PC makers would likely ensure CXMT sells out its expanded capacity.

Dan Niles, founder of Niles Investment Management, believes many investors underestimate how much market share CXMT and China could capture. His argument draws from historical DRAM leadership shifts: in 1975, U.S. companies controlled 95% of the DRAM market, with Intel alone holding 75%. Japan transformed DRAM into a commodity business and increased its share to 80% by 1985, while the U.S. fell to 10% and then 2% by 1990. South Korea repeated this playbook in the mid-1980s and eventually displaced Japanese suppliers, accounting for roughly 62% of global DRAM production today. With Micron investing hundreds of billions in U.S. DRAM capacity, the U.S. is set to regain major presence. According to Niles, China could capture 30% of the market by 2030.

China already consumes around 30% of global memory output due to its hundreds of millions of domestically and globally distributed PCs and smartphones. Given China's push for semiconductor self-sufficiency and willingness to invest heavily in domestic fabs, rapid gains in DRAM output and share are plausible. The government has reportedly asked CXMT to share its process technologies with other Chinese makers.

However, multiple technological and political factors could slow CXMT's and China's DRAM expansion. Export controls currently prevent Chinese entities from acquiring sophisticated wafer fab equipment needed for 18nm-class DRAM production and more advanced nodes. If the proposed MATCH Act passes, restrictions will become more severe, further limiting expansion capacity.

Even if CXMT produces more advanced DRAM using older tools at sub-16nm nodes, the company will need to acquire such tools in significant quantities. Companies like ASML have limited production capacity, and CXMT is not the only memory maker seeking expansion. While SMEE and SiCarrier are developing lithography tools in China, immersion DUV scanner production is unlikely to ramp up substantially in the near term.

Operating leading-edge DRAM production at high yields requires more than fab construction. China has recruited engineers from Micron, Samsung, SK hynix, and TSMC for years, but scaling from three to six or more fabs requires thousands of experienced process, yield, device, lithography, and integration engineers. Building fabs adjacent to existing sites enables knowledge sharing, but whether this will suffice long-term remains uncertain.

Expanding wafer capacity alone is insufficient. DRAM producers must continuously migrate to finer process technologies—16nm-class, 14nm-class, 12nm-class—to remain cost-competitive. Export control delays could force Chinese fabs to produce more wafers at higher cost per bit than competitors.

Finally, some American lawmakers seek to prohibit U.S. companies from acquiring memory from CXMT and other Chinese vendors, fearing China intends to control significant DRAM market share for strategic leverage—something the country already exercises with rare earth metals. If such legislation passes, demand for Chinese DRAM will drop. While output may suffice for domestic consumption, it may not justify 10 or more major DRAM fabs.