South Korea's chip equipment players ride the HBM4 wave

The ramp-up of HBM4 is triggering a cascading technical shift: increased EUV layers, denser TSVs, and surging demand for hybrid bonding tools are enabling Korean equipment makers like SEMES and EUGENE to erode U.S.-Japanese dominance. However, potential tightening of U.S. export controls on advanced packaging gear will compel accelerated domestic substitution—raising R&D costs and extending qualification timelines. In response, Tokyo Electron may lock in SK hynix through bundled service deals, while firms in Taiwan, China face geopolitical compliance barriers limiting core access. Over the next 18 months, HBM4 capacity scaling will redraw global equipment procurement patterns; if Korean suppliers achieve self-reliance in critical modules, they could not only reduce dependence on ASML and Applied Materials but also erect structural moats in the AI memory equipment niche.