Hanmi Semiconductor used this week's SEMICON West to press its claim as the leading supplier of TC bonders, the thermal-compression bonding machines that stack DRAM dies into high-bandwidth memory (HBM) modules, as orders tied to the coming HBM4 generation pick up.

The Korean equipment maker has built its position on the back of the AI memory boom. TC bonders attach memory dies vertically with heat and pressure, and HBM production runs through them at every layer of the stack. Demand for the current HBM3E generation already stretched Hanmi's order book; the shift to HBM4 is now adding to it, the company signaled at the San Francisco trade show.

HBM4 matters to equipment vendors for one reason: the new standard raises stack heights and tightens thermal budgets, which pushes memory makers toward more precise, higher-throughput bonding tools. SK hynix, Samsung and Micron — Hanmi's core customer set — are all preparing HBM4 supply for next-generation AI accelerators, and each new qualified tool generation tends to concentrate orders with the vendor that ships first.

What does the order surge change for buyers and rivals?

For memory makers, it signals that HBM4 capacity tooling is moving from evaluation to procurement. For Hanmi's competitors, chiefly Besi and ASMPT in hybrid bonding and TC bonding, it means the incumbent enters the HBM4 cycle with a demand cushion. SEMICON West, running this week in San Francisco, gave the company the stage to make that case publicly.

The company did not disclose specific order figures or delivery schedules at the show. Watch for those numbers in its next quarterly filing — order backlog disclosure is where the HBM4 ramp becomes measurable, not in booth statements.

For now, the headline fact stands: the leading TC bonder supplier says HBM4-driven orders are accelerating, and it chose the industry's main U.S. venue to say so.