HBM，撞墙了

Core Insights - HBM technology is evolving towards higher stacking layers, with a clear progression from 4 layers to 8, 12, and now approaching 16 layers, enhancing capacity and bandwidth for AI GPUs [1] - The introduction of 16-layer HBM4 by SK Hynix marks a significant milestone, with a single stack capacity of 48GB [1] - The industry is divided between those pursuing revolutionary changes and those advocating for practical improvements [2] Group 1: HBM Technology Evolution - HBM's evolution is characterized by increasing stacking layers, with 8 layers being the most common configuration for AI GPUs due to stable yield and mature supply chains [1] - The transition to 12 layers has become the main production direction in recent years, balancing capacity, performance, and cost effectively [1] - The recent CES 2026 showcased the world's first 16-layer HBM4 sample, indicating the industry's readiness for higher stacking [1] Group 2: Hybrid Bonding and Fluxless Technology - Hybrid bonding is a cutting-edge interconnection technology that eliminates solder and flux, achieving closer to direct connections with higher I/O density [3] - The recent JEDEC revision allows for a height increase in HBM modules, providing more space for traditional micro-bump technology, which may delay the commercial debut of hybrid bonding [5] - Fluxless technology is emerging as a transitional solution, addressing the challenges of traditional interconnection methods in the context of 16-layer HBM production [7][11] Group 3: Industry Players and Strategies - SK Hynix remains cautious about adopting Fluxless technology for HBM4, opting to continue with its Advanced MR-MUF process, which has proven effective in previous generations [16][19] - BESI is positioned as a proponent of hybrid bonding, focusing on refining technology and market strategies to prepare for future demands [23] - ASMPT emphasizes the importance of TCB as the core platform for HBM stacking, advocating for Fluxless approaches to enhance production stability and yield [24][25] Group 4: Market Dynamics and Future Outlook - The relaxation of HBM4 height standards has extended the lifecycle of micro-bump technology, impacting the competitive landscape among equipment suppliers [22] - The ongoing patent disputes between Hanmi Semiconductor and Hanwha highlight the competitive tensions within the supply chain for HBM technology [27][26] - The industry is likely to see a gradual integration of hybrid bonding rather than an abrupt shift, as companies balance performance and yield in their production strategies [29]