Abstract: A support structure is provided that enables the use of high-voltage phosphors in field-emission flat panel displays, to maintain the vacuum gap between the cathode and the anode at a constant distance and to prevent distortion of the transparent view screen and backing plate of the display. A number of independent techniques each contributes to the solution of the problem of secondary electron emission. One technique is to alter the geometry of the triple junction of the support structure, the cathode, and the vacuum gap, thereby reducing the electrostatic field created at the triple junction. Reducing the electrostatic field reduces the initial primary electron bombardment originating at the triple junction.