ChangXin Memory Technologies

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Chinese semiconductor manufacturer specializing in dynamic random-access memory (DRAM).

Last updated October 30, 2026

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First read: Nov 4, 2026
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Overview

ChangXin Memory Technologies, commonly known as CXMT, is a Chinese semiconductor integrated-device manufacturer headquartered in Hefei, Anhui. The company specializes in the research, development, manufacture and commercialization of dynamic random-access memory, or DRAM, a class of volatile memory used in personal computers, servers, mobile devices, embedded systems and other electronic equipment. Its product portfolio includes DDR and low-power LPDDR families, with the company progressively moving from earlier DDR4 and LPDDR4 products toward DDR5, LPDDR5 and LPDDR5X devices and associated memory modules. The business emerged in 2016 as part of a broader Chinese effort to establish a domestic memory-chip industry capable of competing with Samsung Electronics, SK hynix and Micron Technology. It initially operated under the name Innotron and developed a major 12-inch wafer fabrication operation in Hefei. Construction and equipment installation proceeded during 2017, followed by reported trial production of 19-nanometre LPDDR4 memory in 2018. The company later changed its name to ChangXin Memory Technologies. By late 2019, it reported that its first fabrication plant was in production and manufacturing 8GB LPDDR4 and DDR4 DRAM on a 19-nanometre process. CXMT's strategic importance reflects both the size of the global memory market and China's dependence on imported memory semiconductors. The company's expansion has been supported by regional and national investment vehicles, with Hefei-linked investors reported to hold a substantial combined interest. Its operations have expanded from an initial output of approximately 20,000 wafers per month to substantially larger production volumes. Reference material describes three 12-inch DRAM fabrication plants operating in Beijing and Hefei and reports that production reached approximately 720,000 wafers per quarter by the end of 2025. Market-share estimates vary by source and period, but CXMT has been described as China's largest DRAM producer and one of the world's leading emerging DRAM suppliers. The company has extended its technical ambitions beyond conventional commodity DRAM. It introduced DDR5 products, developed LPDDR5 and LPDDR5X products, and invested in high-bandwidth memory (HBM) for artificial-intelligence processors. Its stated direction includes improving process technology, increasing wafer capacity, expanding product generations and building advanced packaging capabilities. These efforts place CXMT within broader Chinese attempts to build a more self-sufficient semiconductor supply chain. CXMT has also become part of technology and national-security disputes between China and the United States. Under a provision of the Fiscal Year 2023 National Defense Authorization Act, the U.S. federal government is barred from procuring or using CXMT chips. U.S. authorities have reportedly considered additional restrictions, and according to the supplied reference material the company was placed on a U.S. Department of Defense list of Chinese military-linked companies. Separately, in 2023, former Samsung employees were arrested in South Korea over alleged theft of DRAM trade secrets. Reports connected some alleged recruitment and technology-transfer activity to CXMT, although the reference material states that the allegations had not been proven against the company. CXMT has historically been a private company. The supplied reference material describes a proposed Shanghai STAR Market listing intended to fund production-line upgrades, advanced DRAM technology development and long-term research. Because listing details and related financial data are time-sensitive, they should be distinguished from the company's established private-company status unless confirmed by current corporate and regulatory filings. Overall, CXMT is positioned as a strategically important Chinese memory manufacturer working to close technology and scale gaps.

History

ChangXin Memory Technologies was established in 2016 during a period when China was seeking to develop a domestic memory-semiconductor industry. Alongside Fujian Jinhua Integrated Circuit and Xi'an UniIC Semiconductors, the company was part of a group of projects intended to challenge the dominance of Samsung Electronics, SK hynix and Micron Technology in DRAM. It was initially known as Innotron and was based in Hefei, Anhui. In 2017, a large-scale investment plan was announced for a 12-inch wafer fabrication facility. Construction was completed around the middle of that year, with production equipment installed later in 2017. The original development schedule contemplated trial production in 2018 and mass production in 2019. In 2018, the company was reported to have begun trial production of 8GB LPDDR4 memory using a 19-nanometre process. Its early capacity was approximately 20,000 wafers per month, modest compared with the output of established global DRAM companies but significant for a new Chinese producer. During its early development, the company faced the technical and commercial barriers typical of a new entrant to the memory industry. Analysts raised questions about patent ownership, process know-how and intellectual-property access. The company also operated amid growing trade and technology tensions between China and the United States. In 2018, chief executive Zhu Yiming was reported to have visited ASML to discuss lithography equipment, reflecting the importance of advanced manufacturing tools to the company's development. The business changed its name from Innotron to ChangXin Memory Technologies in 2019. That year, reports indicated that it had adjusted aspects of its designs in an effort to reduce exposure to potential technology-related sanctions connected with the China-U.S. trade conflict. In a December 2019 interview cited by the reference material, the company said its first fabrication plant was operating at approximately 20,000 wafers per month and producing 8GB LPDDR4 and DDR4 DRAM on a 19-nanometre process. CXMT subsequently expanded its product and manufacturing base. By 2020, it was manufacturing LPDDR4 and DDR4 memory on a 19-nanometre process. Its product range later grew to include DDR4 modules, LPDDR4X, DDR5, LPDDR5 and LPDDR5X. The company also pursued improvements to process generations and manufacturing scale. Reference material describes three 12-inch DRAM plants in Beijing and Hefei and reports quarterly output of approximately 720,000 wafers by the end of 2025. Market-share estimates supplied for 2025 placed CXMT at roughly 4% of the global DRAM market in the second quarter and approximately 6% of global output in the first quarter, although such figures depend on methodology and reporting period. The company began selling DDR5 SDRAM around the beginning of 2025 and publicly unveiled newer DDR5 products later that year. It has also invested in HBM, a high-performance DRAM technology used alongside processors in artificial-intelligence and other data-intensive systems. The reported plan to establish HBM back-end packaging capability in Shanghai illustrates CXMT's attempt to participate in higher-value memory segments rather than remain focused only on conventional PC and mobile DRAM. CXMT's ownership has involved multiple investment entities, including funds linked to Hefei and Chinese semiconductor-industry development programs. The supplied reference material describes a planned Shanghai STAR Market offering intended to raise capital for wafer-line technology upgrades, DRAM technology upgrades and forward-looking research and development. It also describes regulatory approval of the proposed offering and a subsequent trading debut, but these events are time-sensitive and require verification against current exchange and regulatory records before being treated as settled corporate history. CXMT's growth has coincided with heightened geopolitical scrutiny. U.S. legislation restricted federal procurement of its chips, while U.S. agencies reportedly considered broader measures. The company was also named in a U.S. Department of Defense list of Chinese military-linked companies according to the supplied material. In a separate controversy, former Samsung employees were arrested in 2023 over alleged theft of DRAM trade secrets, with reports connecting some alleged activity to CXMT. The available reference states that these allegations had not been proven against the company. CXMT therefore occupies a distinctive position: it is both a major industrial project in China's semiconductor strategy and a new competitor operating under substantial technological, regulatory and geopolitical pressure.

2025
DDR5 products introduced
[1]ChangXin Memory Technologies - Wikipediaen.wikipedia.org
CXMT expanded into DDR5 DRAM and prepared additional investment in advanced DRAM production and research.
2022
U.S. federal procurement restriction
[1]ChangXin Memory Technologies - Wikipediaen.wikipedia.org
The Fiscal Year 2023 National Defense Authorization Act restricted U.S. federal procurement and use of CXMT chips.
2020
LPDDR4 and DDR4 manufacturing established
[1]ChangXin Memory Technologies - Wikipediaen.wikipedia.org
Reference material identified the company as manufacturing LPDDR4 and DDR4 memory on a 19-nanometre process.
2019
Renamed ChangXin Memory Technologies
[1]ChangXin Memory Technologies - Wikipediaen.wikipedia.org
The company adopted the ChangXin Memory Technologies name and reported production of LPDDR4 and DDR4 DRAM.
2018
Trial production of 19-nanometre LPDDR4
[1]ChangXin Memory Technologies - Wikipediaen.wikipedia.org
The company was reported to have begun trial production of 8GB LPDDR4 memory on a 19-nanometre process.
2017
Large-scale 12-inch fab project announced
[1]ChangXin Memory Technologies - Wikipediaen.wikipedia.org
Plans were announced for a major 300-millimetre wafer fabrication facility, followed by construction and equipment installation.
2016
Company established
[1]ChangXin Memory Technologies - Wikipediaen.wikipedia.org
The business was founded in Hefei as Innotron, joining a group of Chinese memory projects intended to develop domestic DRAM production.

Products and positioning

A strategically important Chinese DRAM manufacturer focused on domestic memory-chip capability, process development, production scale and next-generation memory products.

DRAM · 2019
DDR4 DRAM
DDR4 is a mainstream generation of synchronous DRAM used in personal computers, servers, embedded systems and other digital equipment. CXMT's early commercial production included DDR4 devices manufactured on a 19-nanometre process. The company also lists DDR4 memory modules, extending the offering from individual memory components to assembled products suitable for system integration.
Low-power DRAM · 2018
LPDDR4 and LPDDR4X
LPDDR4-family products are low-power memory devices designed for mobile and energy-sensitive electronics. LPDDR4 was among CXMT's first reported products, with trial production of 8GB devices beginning during the company's early manufacturing phase. LPDDR4X is a later variant intended to reduce power consumption and support mobile, consumer and embedded applications.
DRAM · 2025
DDR5 DRAM
DDR5 is a newer generation of system memory offering higher data rates and architectural improvements over DDR4. CXMT began selling DDR5 SDRAM around the start of 2025 and later unveiled additional DDR5 products. The line represents the company's effort to compete in newer computer, server and data-intensive memory segments while upgrading its process and manufacturing capabilities.
Low-power DRAM
LPDDR5 and LPDDR5X
LPDDR5 and LPDDR5X are advanced low-power DRAM families aimed at smartphones, mobile computing, automotive electronics and other systems requiring high bandwidth with constrained energy use. CXMT lists these products among its offerings, indicating an expansion from its earlier LPDDR4 generation toward more current mobile-memory standards.
Advanced DRAM
High-bandwidth memory
High-bandwidth memory, or HBM, is a specialized DRAM technology used with high-performance processors, including accelerators for artificial-intelligence workloads. CXMT has invested in HBM development and was reported to be planning a Shanghai back-end packaging facility. The reference material describes this as an expansion project rather than a fully established commercial product line.

Controversies

2023
Alleged Samsung DRAM trade-secret transfer
Ten former Samsung employees were reportedly arrested over alleged theft of DRAM trade secrets. Reports connected some of the alleged recruitment and technology-transfer activity to CXMT and stated that one allegedly involved individual later became a development executive. The supplied reference material explicitly notes that the allegations had not been proven against CXMT.
Source

2026
Investment in HBM packaging and production capabilityStrategy
Background
Demand for memory supporting artificial-intelligence processors increased the strategic importance of HBM and advanced packaging.
Action taken
CXMT reportedly pursued an HBM back-end packaging facility in Shanghai and targeted production by the end of 2026.
Aftermath
The project would broaden CXMT beyond conventional DRAM if completed, but the supplied material does not establish commercial production.
Source
2025
Expansion into DDR5 DRAMProduct launch
Background
CXMT sought to move from earlier DDR4 and LPDDR4 products into newer memory generations and higher-value applications.
Action taken
The company began selling and publicly presenting DDR5 DRAM products.
Aftermath
DDR5 became a central part of the company's product and capacity-expansion strategy.
Source
2025
Planned capital raising for advanced DRAM expansionStrategy
Background
The company required additional capital to upgrade wafer lines, develop advanced DRAM and pursue longer-term research.
Action taken
CXMT planned a Shanghai STAR Market offering, according to the supplied reference material.
Aftermath
The proposed listing became a potential source of funding for manufacturing upgrades and next-generation memory research; its final status requires confirmation from current exchange and regulatory records.
Source
2019
Changed company name from Innotron to ChangXin Memory TechnologiesStrategy
Background
The company was developing domestic DRAM production while operating amid increasing China-U.S. semiconductor and technology tensions.
Action taken
It adopted the ChangXin Memory Technologies name and continued production development under the CXMT identity.
Aftermath
The new name became the company's established international identity as it expanded DRAM manufacturing and product development.
Source

Recent events

2026
CXMT plans to launch first 4F² architecture server DDR5 RDIMM by end of 2026[5]长鑫存储计划于2026年底前推出首款4F²架构伺服器用DDR5 RDIMMtechnews.tw
ChangXin Memory Technologies (CXMT) revealed plans to launch its first server-grade DDR5 RDIMM memory module using 4F² architecture before the end of 2026, which would put it ahead in the not-yet-commercialized 4F² DRAM technology field. The company claims 33% higher memory cell density versus its G5 node, but has not published detailed specifications, yield data, or customer orders, and industry observers remain cautious about mass-production feasibility.
2026.10.21
Reported2026.10.21
Changxin Storage announces plan for next-generation DDR5 RDIMM product[6]长鑫存储宣布计划推出新一代DDR5 RDIMM产品finance.sina.com.cn
Changxin Storage announced that it plans to launch a next-generation DDR5 RDIMM product by the end of 2026.
2026.10.16
Reported2026.10.19
CXMT releases nine-month 2026 earnings forecast[7]CXMT发布2026年前九个月业绩预告cnbc.com
CXMT released a forecast for the first nine months of 2026, expecting net profit attributable to shareholders of 131 billion yuan to 132.5 billion yuan and revenue of around 265 billion yuan to 270 billion yuan.
Unconfirmed
Reported2026.10.12
CXMT announces 4F² DRAM progress and plans year-end launch of new DDR5 RDIMM with hybrid bonding[8]长鑫存储公布4F²单元结构研发关键进展，预计年末推出融合混合键合技术的新一代DDR5 RDIMM163.com
At the 4th Integrated Chip and Chiplet Conference recently held in Shanghai, ChangXin Memory Technologies (CXMT) announced key progress in the development of its 4F² DRAM cell structure and said it expects to launch a new-generation DDR5 RDIMM product integrating the 4F² cell structure with hybrid bonding technology by the end of the year.
Unconfirmed
CXMT to introduce next-generation 4F² DDR5 RDIMM product by end of 2026, about two years ahead of Samsung's roadmap[9]长鑫存储预告 2026 年底前推出新一代 4F² DDR5 RDIMM 产品，较三星路线提前约 2 年technews.tw
ChangXin Memory Technologies (CXMT) disclosed new progress in its 4F² DRAM architecture development and previewed a new-generation DDR5 RDIMM product combining the 4F² cell architecture, hybrid bonding and other technologies to be introduced by the end of 2026, which the company positions as about two years ahead of Samsung's roadmap for adopting the same architecture. The product targets the server memory segment rather than low-end consumer memory.
2026.08.29
Reported2026.08.30
ChangXin Memory begins mass production of LPDDR6 memory[10]长鑫存储LPDDR6内存正式量产163.com
ChangXin Memory announced on August 29 that its LPDDR6 memory has entered mass production, with Xiaomi 18 Fold as the first flagship phone to feature it.
2026.08.29
Reported2026.08.29
ChangXin Memory Technologies begins mass production of LPDDR6 memory[11]长鑫存储实现LPDDR6内存量产finance.sina.com.cn
ChangXin Memory Technologies (CXMT) achieved mass production of its self-developed LPDDR6 memory chip, with peak speed of 12,800 Mbps and up to 16GB capacity, and Xiaomi's 18 Fold will be the first phone to carry it.
2026.08.25
Reported2026.08.25
Xiaomi unveils three self-developed XRing chips[12]小米发布三款自研XRing芯片europe.chinadaily.com.cn
Xiaomi unveiled three self-developed chips under its XRing brand at a technology briefing in Beijing: the XRing O3 flagship AI SoC for smartphones, the XRing O100 high-bandwidth AI accelerator, and the XRing D100 intelligent driving chip. All three have completed tape-out verification, with the O3 set to debut in September on the Xiaomi 18 Fold and the O100 and D100 scheduled for commercial deployment in 2027.
2026.08.24
Reported2026.08.25
Xiaomi unveils XRING O3 flagship mobile processor[13]小米发布XRING O3旗舰移动处理器ibtimes.com.au
Xiaomi unveiled its second-generation self-developed flagship system-on-chip, the XRING O3, on Aug. 24. The chip is manufactured on TSMC's 3-nanometer N3P process, is promoted as the world's first mobile processor to support LPDDR6 memory, and achieved an AnTuTu v11 benchmark score exceeding 5.22 million points. It will debut in the Xiaomi 18 Fold and Xiaomi Pad 9 Pro Max, both scheduled for release in September.
Unconfirmed
Reported2020.09.25
Maxsun and Changxin Storage launch Taiji G3 DDR4 memory[14]铭瑄联合长鑫存储发布太极 G3 DDR4 内存diy.it168.com
Maxsun and Changxin Storage jointly released the Taiji G3 3000MHz DDR4 memory series. The article says it is a domestically produced product.

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