Ultraviolet Light Sources Incorporating Atmospheric Pressure Micro-Hollow Cathode Discharges

Period of Performance: 04/15/2005 - 04/15/2007


Phase 2 STTR

Recipient Firm

Ultraviolet Sciences, Inc.
4334 Valle Vista
San Diego, CA 92103
Principal Investigator

Research Institution

Old Dominion University
IA Div. Human Factors & Erg MGB 346X
Nolfolk, VA 23529
Institution POC


A new deep-ultraviolet light source has been developed which employs a micro-hollow cathode discharge formed in cathode cavities with dimension on the order of 100 um. The hollow-cathode lamp has numerous advantages over other light sources, including operation at relatively low voltages in a quiescent DC or repetitively pulsed mode, linear control of the intensity by controlling the current, scalability to large areas, and a radiant emittance exceeding that of commercially available excimer lamps by more than an order of magnitude. This proposal describes a program to address and resolve key issues for converting this developmental ultraviolet source into a manufacturable, low cost, high radiant emittance, long lifetime, large area excimer lamp which can cover a wavelength range from 76 nm to 308 nm. The work will include incorporating these lamps into a practical system which uses these lamps to deliver ultraviolet light for a number of applications. Applications of these novel excimer lamps include UV polymerization and surface photo-chemistry, photolithography, bacterial decontamination, pollution control, chemical decomposition, generation of radicals, and general lighting.