Korean Semiconductor Industry Association 2026 Assessment: YMTC and CXMT Narrow NAND Gap to About 1 Year, DRAM
An assessment by the Korea Semiconductor Industry Association finds that China's two major memory makers, Yangtze Memory Technologies and ChangXin Memory Technologies, have significantly narrowed their technology gaps with global leaders. The gap is about one year in NAND flash, about two years in DRAM, and about three years in high bandwidth memory. The industry once saw a roughly five-year gap between China's memory sector and advanced international levels, a deficit now compressed across several segments.
Samsung Electronics and SK Hynix have long held leading positions in the global memory market. An assessment by the Korea Semiconductor Industry Association shows that the technology gaps of China's two major memory companies, Yangtze Memory Technologies (YMTC) and ChangXin Memory Technologies (CXMT), have narrowed markedly in key technology areas: about one year in NAND flash, about two years in DRAM, and about three years in high bandwidth memory (HBM). Several years ago, the industry widely believed that China's memory sector lagged advanced international levels by nearly five years, a gap that has now been compressed in multiple segments.
In NAND flash, YMTC is China's largest NAND manufacturer and continues to advance research and development of high-layer-count 3D NAND technology. Industry data show that Samsung Electronics and SK Hynix began mass production of 300-layer NAND products in 2025, while YMTC has already gained the capacity to produce 270-layer products. In DRAM, Samsung Electronics and SK Hynix began mass production of DDR5 products in 2023, while CXMT entered the DDR5 era in 2025, has achieved mass production of LPDDR5X, and has begun advancing production work on LPDDR6 products.
HBM is the area where China's memory industry trails the international leading level by the widest margin, with the current assessed gap at about three years. CXMT has begun trial production of HBM3E products, but yields remain at a low level, and the company still faces technical challenges in core manufacturing steps such as through-silicon via (TSV) vertical interconnection. To advance HBM research and development, CXMT is cooperating with YMTC, using YMTC's Xtacking hybrid bonding technology to build HBM products. Unlike the traditional approach of connecting memory chips through micro-bumps, copper-to-copper hybrid bonding can directly connect different wafer layers, shortening circuit paths and improving stacking efficiency.
Why this event matters
The event has a measured impact on 1 industry. The strongest current signal is positive for Semiconductor Value Chain, with intensity 70/100 and 72% confidence over a medium term horizon.
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