TRANSPARENT ELECTRODE FOR PARTICLE MIGRATION IMAGING
Original Publication Date: 1982-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
In particle migration imaging, the transparency of the base electrode should be as large as possible. Conventional aluminum electrodes have an optical density of 0.2 to 0.3. A transparent conducting nickel layer on Mylar can have a total density of as little as about 0.1, of which 0.05 is due to the Mylar. When heat developed, particle migration imaging films on such electrodes exhibit identical sensitometric properties as aluminum electrode particle migration films, except that all densities are about 0.15 lower with the nickle electrode. Dmi (blue diffuse) is just over 0.5 compared with the usual values of just under 0.7. Resolution appears unchanged and latent image life is good. Duplicating exposure time of heat developed particle migration films is reduced from about 3.5 times to about 2.5 times that of silver films. Moreover, it is expected that meniscus development (such as described in Canadian Patent 951,365) of particle migration imaging films having a transparent nickel electrode would reduce Dmin to slightly more than that of silver films while greatly reducing the interference colors normally associated with meniscus devel-opment.