Hybrid Bonding: Imec and EV Group 200nm demo explained

September 26, 2026September 27, 2026

Tara Minunilor Belgium

Overview

Hybrid bonding, a semiconductor integration technology, directly connects dies or wafers with copper, bypassing traditional solder microbumps. Imec and EV Group demonstrated 200nm copper interconnect pitch wafer-to-wafer bonding in 2026, showcasing scalability for 3D chip stacking. TSMC also reported its SoIC bond pitch starting below 10 micrometers, with 3nm chip stacking technology entering mass production in 2025. This enables high-density 3D stacking crucial for next-gen AI chips.

In Depth

Key Findings: Hybrid Bonding Evolves into a Scalable Manufacturing Platform for 3D Chip Stacking

Hybrid bonding is a transformative semiconductor integration technology that directly connects two dies or wafers with copper, bypassing reliance on traditional solder microbumps. This advancement holds the potential to convert 3D chip stacking into a scalable mass manufacturing platform. Notably, in 2026, Imec and EV Group successfully demonstrated wafer-to-wafer (W2W) bonding at a remarkably fine 200nm copper interconnect pitch, proving the high scalability of this technology.

Technical Details: Copper-to-Copper Bonding and Miniaturization Progress

At its core, hybrid bonding involves directly joining exposed copper interconnects on the surfaces of dies or wafers. This direct copper-to-copper bond achieves extremely low electrical resistance and superior thermal conductivity, enabling significantly higher interconnect densities than conventional microbumps. The successful 200nm pitch W2W bonding by Imec and EV Group indicates that this technology has reached the miniaturization levels required for next-generation semiconductors. This allows for the integration of more signal and power lines within a confined space, contributing to enhanced data transfer speeds and reduced power consumption.

Industry Trends and Applications: TSMC’s SoIC and 3nm Chip Stacking

Hybrid bonding is already being implemented by major industry players. TSMC has reported utilizing hybrid bonding, with bond pitches starting below 10 micrometers, in its 3D stacking technology, SoIC (System-on-Integrated Chips). The company’s 3nm chip stacking technology entered mass production in 2025, underscoring the maturity and importance of hybrid bonding at advanced process nodes. This technology is particularly valuable for complex heterogeneous integration applications, such as the highly efficient integration of HBM (High Bandwidth Memory) and logic chips essential for AI processors.

Future Outlook: Pushing the Boundaries of Semiconductor Performance

As discussions around the limits of Moore’s Law intensify, hybrid bonding technology stands as one of the primary drivers for further semiconductor performance improvement. Coupled with advancements in chiplet design and 3D stacking technologies, this bonding method enables the creation of higher-performance, lower-power, and more compact next-generation electronic devices. Continuous investment and innovation by research institutions and leading manufacturers are expected to lead to even finer miniaturization and broader adoption of hybrid bonding in the coming years. This will accelerate technological breakthroughs in fields such as AI, 5G/6G communication, autonomous vehicles, and high-performance data centers.

Source: https://tara-minunilor.ro/2026/09/22/hybrid-bonding-the-copper-to-copper-technology-turning-3d-chip-stacking-into-a-scalable-manufacturing-platform/

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