Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Email Facebook Twitter Google+ LinkedIn Comments

Actinix Awarded Patent for Vacuum UV Light Source
Feb 2003
SOQUEL, Calif., Feb. 26 -- Actinix researchers Andrew Merriam and James JacobActinix have been granted US Patent No. 6,525,868 for a system and method to generate coherent radiation at vacuum ultraviolet (UV) wavelengths using efficient four-wave mixing. The patent is applicable to 157 nm semiconductor microlithography, photomask metrology and inspection, atomic physics research and nanotechnology.

Actiniex said the method described in the patent involves preparing a special "atomic cocktail" of xenon and mercury atoms. The xenon atoms provide the nonlinear effect that actually creates the vacuum UV light while the mercury atoms increase the strength of the interaction through a process called phasematching. Actinix uses two beams from a compact solid-state laser system to drive the xenon/mercury "four wave mixer." High power (up to one watt) and high spectral purity vacuum UV radiation in the wavelength range of 100 to 200 nm will be possible with this system, the company said.

For example, starting with ten watts of green laser power, Actinix expects to generate over one-tenth of a watt at 157 nm. This highly coherent vacuum ultraviolet light could then be injected into larger excimer laser amplifiers, resulting in improved photolithography exposure tools. Lower power embodiments will be used for metrology and inspection tools for advanced 157 nm phase shift photomasks. The UV source will also replace excimer lasers in applications where higher spatial and spectral quality is required, Actinix said.

For more information, visit:

The science of measurement, particularly of lengths and angles.
Basic ScienceindustrialmetrologyNews & Features

Terms & Conditions Privacy Policy About Us Contact Us
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2019 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA,

Photonics Media, Laurin Publishing
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.