Processing materials at atmospheric pressure provides clear advantages over
traditional, vacuum-based plasma processing: in addition to reduction in t
he capital cost of equipment and the elimination of constraints imposed by
vacuum-compatibility, high pressure and low temperature plasma processes of
fer unprecedented improvements for generation of active chemical species, h
igh chemical selectivity, minimal ion densities resulting in low Surface da
mage and surface treatment methods unattainable by other means. We describe
several variations of this unique plasma source and some of its potential
applications.