Samsung has successfully developed the world's first 900-layer V-NAND prototype system, far exceeding the current mass production record of 321 layers, and has verified its practical operational capabilities. By leveraging Cell Multi Bonding (CMB) technology to break through the physical limits of stacking, Samsung has achieved a generational leap in research and development. This advancement is expected to help Samsung reclaim leadership in memory technology and establish higher barriers in the AI server and high-performance storage markets.
Samsung Electronics has made a significant breakthrough in NAND flash stacking technology, which could re-establish its technical dominance in the global memory chip market. The company recently achieved the world's first 900-layer V-NAND prototype system and verified normal cell operation characteristics. This accomplishment means Samsung has reached the 900-layer milestone in the R&D phase, while the current highest record in mass production remains at 321 layers.
Following the announcement, industry observers widely believe Samsung has secured a favorable position in the competition for next-generation NAND technology. This development also helps build a higher technical barrier against pricing and capacity offensives from Chinese manufacturers. Samsung is not only advancing preparations for its 10th-generation V-NAND (V10, over 400 layers) for mass production but has also achieved a cross-generational lead in R&D. This dual-track strategy helps solidify its long-term competitiveness in markets such as AI servers and edge-side AI storage.
The realization of the 900-layer V-NAND relies on Cell Multi Bonding (CMB) technology—bonding two 450-layer cell wafers into one, thereby achieving a significant capacity increase within a single chip size. The core logic of NAND flash lies in vertical stacking: the higher the number of layers, the greater the data storage capacity per unit area, with corresponding improvements in power efficiency. This characteristic makes high-layer-count NAND a critical component for high-capacity, high-efficiency applications such as AI servers, data center SSDs, and smartphones.
However, increasing the stack layer count comes with challenges. As layers increase, wafer warpage and misalignment become core issues affecting yield. Samsung addressed the warpage problem by introducing a high-precision upper chuck design and developed a proprietary "new overlay correction" technology to overcome alignment errors. Additionally, the introduction of new bit line (BL) and word line (WL) structures allowed the chip to reduce power consumption while further shrinking its size.
Samsung stated that it has "verified normal cell operation characteristics" for this prototype, emphasizing that this achievement goes beyond theoretical stacking demonstrations and reaches a technically operational level.
In the current mass production market, SK Hynix holds the highest layer count record with its 321-layer 4D NAND, leading Samsung's existing mass-produced products. Samsung is accelerating preparations for the mass production of its V10 generation products to narrow the gap on the commercialization front.
Facing competitive threats, the strategic value of Samsung's 900-layer prototype lies not only in the technology itself but also in the market signal it sends. Industry insiders noted, "900-layer NAND technology is not simply three times the stacking of 300 layers; it represents a fundamental change in the stacking process paradigm. This sends a clear message to global customers that Samsung remains a technology leader, while also imposing constraints on the capacity and pricing offensives of Chinese enterprises."
Samsung pioneered the commercialization of 3D V-NAND in 2013 and has since continued to drive process iterations to break through stacking limits. The early "single stacking" method completed stacking through one-time etching of micro-holes, but as layer counts increased, physical bottlenecks such as wafer deformation and alignment difficulties became more prominent. The introduction of CMB technology marks Samsung's paradigm shift in process路线 from single stacking to multi-wafer bonding, laying the technical foundation for the era of 1,000-layer NAND.
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