Rumor
YMTC develops high bandwidth flash technology to integrate 3D NAND with AI accelerators
Thursday, December 4, 2025 at 10:16 AM
YMTC is developing high bandwidth flash (HBF) technology using its Xtacking architecture to integrate 3D NAND directly with AI accelerators and GPUs. Utilizing hybrid bonding and through-silicon vias (TSV), the company aims to bridge the gap between HBM cost constraints and traditional SSD capacity, positioning HBF as a high-bandwidth, large-capacity solution for AI infrastructure.
Context
China’s leading memory maker, YMTC, is pivoting to High Bandwidth Flash (HBF) to challenge the cost and capacity limitations of current HBM solutions. By utilizing its proprietary Xtacking architecture and hybrid bonding, YMTC plans to integrate 3D NAND directly with GPUs and AI accelerators via 2.5D and 3D packaging. This technical roadmap, detailed in a major joint paper ahead of 2026, aims to provide the high-speed, large-capacity storage required for massive AI models while circumventing tightening US export restrictions.
This development intensifies the rivalry with Micron, which remains embroiled in patent litigation with YMTC. As the AI hardware race shifts toward specialized memory architectures, YMTC is leveraging its mass-production experience in hybrid bonding to reduce signal delay and power consumption. For investors, this marks a strategic attempt by China to achieve memory self-sufficiency, positioning HBF as a vital bridge for next-generation high-performance computing despite ongoing geopolitical pressures and supply chain constraints.
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