IN Brief:
- Air Liquide has signed a long-term agreement to support SK hynix’s P&T7 packaging and testing fab in Korea.
- The nearly €200m investment will fund a nitrogen production unit and high-purity gas supply.
- HBM growth is pushing semiconductor manufacturing constraints beyond wafer fabrication into packaging, testing, and process materials.
Air Liquide will invest nearly €200m in Korea to support SK hynix’s P&T7 advanced packaging and testing facility in Cheongju, expanding supply of high-purity gases and compressed air for high-bandwidth memory production.
The French industrial gases group has signed a long-term contract with SK hynix and will build and operate a nitrogen production unit serving the new fab. Operations are expected to begin in late 2027, following Air Liquide’s acquisition of DIG Airgas and the expansion of its local gas infrastructure in Korea.
The facility will support advanced packaging and testing for HBM, a memory technology now central to AI accelerators and high-performance computing systems. HBM production requires dense vertical stacking, fine interconnects, thermal control, and tightly managed process environments, with gas purity and supply stability directly connected to yield and throughput.
AI demand is pushing semiconductor constraints beyond wafer fabrication. Packaging, test capacity, substrates, interposers, process materials, and industrial utilities are all becoming limiting factors as memory makers scale HBM output. High-purity gases support deposition, etch, cleaning, purging, and other controlled manufacturing steps, making them part of the core production chain rather than a background service.
The pressure can already be seen across capital equipment and production infrastructure. Rising semiconductor equipment billings linked to AI demand show where investment is moving, while memory-led market growth is changing the balance of the chip sector. Air Liquide’s Korean project adds the industrial gas and utility layer to that same expansion.
HBM has become one of the defining supply constraints for AI hardware because accelerator performance is increasingly tied to memory bandwidth. That shifts value towards packaging and test processes capable of handling stacked die, micro-bump integrity, known-good-die management, and final validation under demanding thermal and electrical conditions. Back-end operations once treated as lower-profile manufacturing steps now sit near the centre of competitive performance.
Process gases are a quiet but critical part of that shift. The purity, pressure stability, and continuity of gas supply can influence manufacturing consistency, while on-site generation reduces logistics risk for high-volume fabs. As advanced packaging lines grow in scale, supporting infrastructure must be engineered with the same reliability expectations as the production tools themselves.
AI server demand is also feeding through to board-level production, with ASMPT seeing stronger demand from AI server boards. The connection between HBM manufacturing and downstream assembly is tightening: memory availability affects accelerator supply, accelerator supply drives server-board complexity, and server-board production creates further demand for inspection, placement, and thermal-management capability.
Air Liquide’s investment also illustrates Europe’s role in a supply chain still heavily concentrated in Asia. A French supplier is deepening its presence in Korean semiconductor infrastructure because advanced memory manufacturing is clustered around companies such as SK hynix. Europe’s semiconductor resilience ambitions will continue to depend not only on local fabrication capacity, but also on participation in the specialist materials, gases, and equipment that support global production.
As HBM demand continues to rise, competitive advantage will sit with companies able to scale the full manufacturing environment around the memory device. Wafer processes, packaging lines, metrology, process gases, thermal systems, and test infrastructure all need to expand together. Air Liquide’s investment shows that the industrial base surrounding advanced semiconductors is growing in step with the devices themselves.
