We have developed an electrode system which consists of two equal shaped el
ectrodes to produce a uniform distributed corona discharge. Each electrode
has a lot of fine rods arranged with an equal distance on a flat plate (151
.5 X 49.5 nim) which allows a surface treatment in a wide area. The corona
discharges were initiated by a high frequency power supply of 350 W (15-30
kHz variable). Measurements of the uniformity of the corona have been made
by the surface wettability of treated substrate surface by varying the prod
uct of the time of exposure and the input power. The wettability has been e
stimated by the reduction of the contact angle of water to the substrate. I
t has been postulated that the uniformity obtained was approximately 18.7%
over the total length of the substrate (120 mm) using this electrode system
. (C) 2001 Elsevier Science B.V. All rights reserved.