SK hynix Confirms HBM4 Bonder Dual-Sourcing, Tapping Hanwha Alongside Hanmi to Secure Supply Chain

SK hynix is diversifying its HBM4 TC bonder supply chain by adding Hanwha Semitec alongside Hanmi Semiconductor, a strategic move to ensure stable production capacity.

This dual-sourcing strategy is driven by urgent demand from major clients like NVIDIA, which confirmed all three memory makers are producing HBM4 for its upcoming Vera Rubin platform.

By securing multiple suppliers, SK hynix aims to mitigate risks from production bottlenecks and patent disputes, ensuring a smooth ramp-up for HBM4 mass production by 2026.

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SK hynix is strategically redesigning its supply chain for HBM4, the next-generation AI memory, by officially bringing in two suppliers for a critical piece of equipment.

This entire story accelerated in early June. First, NVIDIA CEO Jensen Huang announced that SK hynix, Samsung, and Micron had all passed qualification for HBM4 and were already in production. This was a clear signal of confirmed demand for NVIDIA's upcoming Vera Rubin AI platform, set to ship in 2026. This put pressure on memory makers to secure their production lines immediately.

Responding to this, SK hynix placed a large ₩44.2 billion order for TC Bonders with its long-time partner, Hanmi Semiconductor, on June 8. Just two days later, reports emerged that Hanwha Semitec had also received an order of a similar scale. This sequence of events confirmed that SK hynix is pursuing a 'dual-sourcing' strategy. Instead of relying on a single company, it's spreading its orders to ensure it can build enough HBM4 chips without delay.

This decision is about more than just increasing volume; it's a sophisticated risk management play. Firstly, it prevents a production bottleneck. If one supplier faces delays, the other can help pick up the slack, ensuring a stable supply for customers like NVIDIA. Secondly, it hedges against legal risks. Hanmi and Hanwha are currently in a patent dispute over TC bonder technology. By working with both, SK hynix can continue production regardless of the lawsuit's outcome.

This dual-sourcing fits into SK hynix's broader investment narrative. The company has already committed trillions of won to new advanced packaging plants and cutting-edge EUV manufacturing tools. Securing the back-end equipment from multiple vendors is the final, crucial piece of the puzzle to prepare for the massive HBM4 demand wave expected in 2026.

TC Bonder: A key piece of equipment in semiconductor manufacturing that uses Thermal-Compression (heat and pressure) to stack and bond memory chips vertically, which is essential for making HBM.
Dual Sourcing: A supply chain strategy where a company procures a component from at least two different suppliers. This reduces the risk of disruption if one supplier fails and can improve negotiating power.
HBM (High Bandwidth Memory): A high-performance type of computer memory where DRAM chips are stacked vertically to provide much faster data speeds than traditional memory, crucial for AI and high-performance computing.