CXMT Supply Chain Prepares Major Manufacturing Shift Ahead of DDR6 Race

China’s CXMT is strengthening its memory supply chain years before DDR6 reaches commercialization, with South Korean substrate manufacturer Haesung DS considering a transition toward a panel based production process designed for increasingly complex memory packages.

According to ETNews, Haesung DS passed CXMT’s quality qualification testing for DDR5 package substrates during Q1 2026. Initial shipments began contributing to the company’s revenue during Q2, while supply volumes are expected to expand more significantly throughout 2027. The qualification makes Haesung DS a new supplier to CXMT as the Chinese memory manufacturer increases production of DDR5 and LPDDR5X products.

Haesung DS currently produces DDR4 and DDR5 package substrates through the Reel to Reel process. This manufacturing method continuously moves substrate material through a production line, providing high productivity, consistent copper thickness, and strong cost control for the single layer and low layer substrates commonly used with existing DRAM standards.

The process becomes less efficient and profitable as additional circuit layers are introduced. Since DDR6 packages are expected to require more complex and higher layer substrate designs, Haesung DS is evaluating the installation of a panel based production line at its expanded Changwon facility. The company has not finalized the investment, but it confirmed that panel processing is being actively considered to address future DDR6 and premium package substrate demand.

Samsung Electronics, SK hynix, and Micron are also developing DDR6 products, with industry commercialization currently expected between 2028 and 2029. However, final specifications, manufacturing requirements, and product schedules are still developing, meaning the commercial timeline could change as memory manufacturers, substrate suppliers, and platform companies move through sampling and validation.

CXMT still trails the established memory leaders in advanced process technology and premium products such as High Bandwidth Memory. Reuters reported that CXMT held approximately 7.7% of the global DRAM market in 2025, placing it behind Samsung, SK hynix, and Micron. However, the company continues to benefit from growing Chinese demand, major production investments, and customers seeking additional supply sources during the current memory shortage.

CXMT secured an $8.6 billion public offering, providing additional capital for DRAM capacity, DDR5 development, and future advanced memory projects. CXMT chips have also started appearing in internationally recognized products, including a Corsair DDR5 module reportedly using CXMT DRAM.

The panel process evaluation does not mean CXMT is already ready to manufacture DDR6, but it shows that the company and its suppliers are planning for the packaging changes before mass production begins. Samsung and SK hynix still maintain considerable advantages in process technology, yields, customer validation, and global scale. However, CXMT could become a more credible competitor if it enters the DDR6 cycle with sufficient capacity, qualified substrates, and a mature supply chain instead of arriving several years behind the market leaders.

Could CXMT become a serious DDR6 competitor by 2029, or will Samsung and SK hynix maintain their technological advantage?