also provide a means to adjust the field pattern and the emission and to focus the emitted electrons ceramic green tape u00ae is especially useful in constructing a multilayer cathode backplate structure with multiple control electrodes the base 11 of fig3 a can be soda glass borosilicate glass glass ceramic or a dielectric material but preferably is ceramic green tape u00ae a layer of an electrical conductor 12 is deposited onto the base e g by screen printing by using a photopatterning material such as fodel u00ae conductor paste this conductor serves as the cathode electrode and can be patterned or continuous if patterned portions of this conductor that are electrically isolated from the portions serving as the cathode electrode can be used as busses for supplying different voltages to the other electrodes and vias can be formed in the ceramic green tape u00ae and filled with conductor to provide connection between a given buss and the appropriate electrode as an example via 20 and buss 21 are shown a second ceramic green tape u00ae layer 13 is punched or drilled to form channels in which to place the field emitter and to form vias and placed on the cathode electrode an electrical conductor 14 is formed on layer 13 according to a pre determined pattern the electrical conductor 14 serves as a.