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AI supply chain term

Hybrid bonding

Hybrid bonding is an advanced technique that joins two chips directly with copper-to-copper connections, allowing far denser and faster links than traditional solder bumps.

What it means

Hybrid bonding is a method for stacking or joining chips by fusing their copper pads and surrounding dielectric directly together, without the tiny solder bumps used in older packaging. Because the copper connections can be placed extremely close together, hybrid bonding delivers far more interconnects per unit area and shorter electrical paths, which improves bandwidth and power efficiency between stacked dies. It is a key enabler of 3D chip stacking and the most advanced forms of packaging like CoWoS, and it is increasingly important for stacking memory and logic in AI accelerators. Hybrid bonding sits in the packaging layer of the AI supply chain and demands extreme cleanliness and alignment precision, so the specialized equipment and process know-how are held by only a few suppliers, making it both a lever for higher performance and a potential capacity constraint.

Why it matters to investors

Hybrid bonding pushes performance past the limits of solder-based packaging, but the precision equipment and process expertise sit with a narrow set of suppliers. BE Semiconductor is a leader in hybrid-bonding tools, TSMC integrates the technique into its packaging platforms, and Disco and Onto Innovation supply the dicing and inspection steps it relies on.

See Hybrid bonding in the AI value chainIts live model score, why it matters, and every company exposed to it.

Companies on this part of the chain

BE Semiconductor Industries N.V.BESITSMCTSMDisco Corporation6146.TOnto InnovationONTO

Named to show where the term sits in the AI supply chain — research, not advice, and never a recommendation to buy or sell.

Related terms

CoWoS (Chip-on-Wafer-on-Substrate)Chip-on-Wafer-on-Substrate — the advanced packaging that fuses compute dies and memory into one accelerator.Advanced packagingAssembling compute dies and memory into a finished, working chip — a real capacity bottleneck.ChipletA chiplet is a small, specialized silicon die that is combined with other dies in one package instead of building a single large monolithic chip.HBM (High-Bandwidth Memory)High-Bandwidth Memory — DRAM stacked next to an accelerator to feed it data fast; often the real limit on GPU output.

See Hybrid bonding in the live AI chain.

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THE ENTITY is an educational read on the AI supply chain — research, not investment advice. It explains how the chain works and who sits where, never price targets or buy/sell calls.