LIN

Linde doesn't make chips. It makes the atmosphere inside the factory that makes chips.

Every semiconductor fab in the world operates inside a controlled gas environment. Plasma etching requires precise mixtures of nitrogen trifluoride, fluorine, and chlorine compounds. Chemical vapor deposition needs ultra-pure argon and nitrogen at 99.999%+ purity. Cleanroom air handlers cycle filtered nitrogen continuously. Without these gases flowing at exact pressures and purities, a $20 billion TSMC fab is an expensive building full of idle equipment.

Linde supplies these gases through on-site Air Separation Units — industrial plants the size of a small warehouse, built adjacent to fabs, that cool air to cryogenic temperatures and separate it into component gases through fractional distillation. These ASUs are piped directly into the fab's gas distribution system. A single advanced fab may have two to three ASUs for redundancy, each operating at temperatures below -150°C. Linde also supplies specialty gases (fluorine compounds, phosphine, silane) in compressed cylinders and bulk delivery for specific process steps.

The company is massive: $34 billion in revenue across industrial gases for refining, chemicals, food processing, healthcare, steel, and electronics. Semiconductor and electronics represent roughly 9% of total sales — the fastest-growing segment, but still a single-digit slice of a diversified industrial conglomerate. Linde operates in over 100 countries with approximately 67,000 employees. The 2018 merger with Praxair created the world's largest industrial gas company by market cap.

For AI infrastructure investors, Linde matters not as a growth story but as a utility-grade input. Every chip requires Linde's gases. The question is how much of Linde's value accrues from AI versus the other 91% of the business.