25/07/2026
Guide to Excimer Laser Gas Mixtures:
What is an Excimer Laser Gas Mixture?
Excimer laser gas mixtures are specialized blends of noble gases (e.g., krypton, argon, xenon) and reactive halogen gases (e.g., fluorine, chlorine) that generate pulsed ultraviolet (UV) light when electrically excited. These precise formulations enable cutting-edge applications from semiconductor manufacturing to corneal surgery.
Key Components:
Base Gases: Kr (Krypton), Ar (Argon), Xe (Xenon)
Halogen Donors: F₂ (Fluorine), Cl₂ (Chlorine)
Buffer Gases: Ne (Neon), He (Helium)
Emission Wavelengths
Different types of excimer lasers typically emit at wavelengths between 157 and 351 nm:
Excimer Wavelength
F2 (fluorine) 157 nm
ArF (argon fluoride) 193 nm
KrF (krypton fluoride) 248 nm
XeBr (xenon bromide) 282 nm
XeCl (xenon chloride) 308 nm
XeF (xenon fluoride) 351 nm
For various of those wavelengths, specialized excimer optics (ultraviolet optics) have been developed, which need to have a high optical quality and in particular a very high resistance to the intense ultraviolet light.
Top 3 Industrial Applications of Excimer Laser Gas
1. Semiconductor Lithography
KrF (248nm) & ArF (193nm) Lasers: Dominant in EUV photolithography for
