Neon, Krypton & Xenon: How Rare Gases Power Semiconductors and Spacecraft

Short answer: Neon powers displays and semiconductor lithography lasers, krypton runs KrF excimer lithography at 248nm, and xenon drives ion thrusters for spacecraft plus anesthesia and high-intensity lighting. Rare gases are extracted from air by cryogenic distillation and purified to 99.999%–99.9995% (5N–5N5). For buyers, the key questions are purity grade, cylinder/valve compatibility and supply security — neon supply chains are notoriously concentrated.

How rare gases are made

Rare gases — helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) — are separated from air by fractional distillation: air is compressed, liquefied and rectified, then each gas is purified to high purity (99.999%–99.9995%). Krypton and xenon are so scarce in air that a large plant processes millions of cubic meters of air to produce a few liters of pure product.

Where each rare gas is used

Neon: the semiconductor supply chain that broke records

Neon is the standout story. Neon gas is essential for the excimer lasers used in semiconductor lithography, and its supply is concentrated in a handful of producers. Newradar’s cooperation on neon with partners in Russia, the U.S. and elsewhere made its neon supply account for 45% of the global semiconductor industry’s neon usage — a reminder of how concentrated and strategic this market is. Buyers should secure rare-gas supply through suppliers with diversified sourcing.

Krypton: the 248nm lithography workhorse

KrF excimer lasers produce 248nm ultraviolet light — one of the workhorse wavelengths for semiconductor wafer lithography. Krypton is the rare-gas component of the KrF laser mixture. Purity stability matters: contamination in the laser gas degrades pulse energy and window lifetime.

Xenon: from deep space to the operating room

• Spacecraft propulsion: xenon ion thrusters use electric fields to accelerate xenon ions, providing efficient, long-duration thrust for satellites and deep-space probes.
• Lighting: xenon lamps produce intense, daylight-like light for projectors, automotive HID headlights and photography.
• Medical: xenon is used in anesthesia gas mixtures and in XeCl (308nm) dermatology excimer lasers.
• Semiconductor tools: xenon appears in F₂/Xe and XeCl excimer laser mixtures.

Product parameters you should specify

FAQ

Q1: What purity do I need for rare gases?
Most lab and semiconductor uses need 5N (99.999%) or 5N5 (99.9995%); 6N is used for ultra-critical applications such as high-end helium processes. Specify the grade explicitly — “rare gas” alone is not a spec.

Q2: Why is neon supply considered a risk for semiconductor fabs?
Because neon is a by-product of steelmaking air-separation and its refining is concentrated in very few plants worldwide. Any disruption propagates directly into lithography gas supply — which is why 45%-share suppliers and multi-source strategies matter.

Q3: Can you ship rare gases internationally?
Yes — rare gases ship as compressed gases in UN-approved cylinders (8L–50L) with appropriate documentation (MSDS, CoA). Suppliers with export experience (40+ countries) handle hazmat paperwork and cylinder logistics.

Q4: What is a HeNe laser?
A helium-neon laser is a small gas laser using a He-Ne mixture, commonly emitting 632.8nm red light — used in alignment, interferometry and barcode scanning.

Q5: How are krypton and xenon packaged?
Typically in 8L–50L high-pressure cylinders with G5/8 or CGA580 valves. Because both gases are expensive, cylinders are often customer-owned or leased; confirm return logistics with your supplier.

Q6: Is xenon safe to handle?
Xenon is non-toxic and inert but can displace oxygen in confined spaces. It is also expensive and must be handled with leak-tight fittings. Follow the MSDS and use dedicated regulators.

Sources

• CGA (Compressed Gas Association) — cylinder valve connection standards (CGA580, G5/8)
• SEMI standards for lithography and semiconductor gases
• Public semiconductor industry analyses of neon supply concentration
• Cryogenic air-separation engineering references (rare-gas recovery)
• Newradar 2026 corporate brochure — rare gas product parameters (www.nrdgas.com)