Patent ID: 6982521

Claim:
A visual display comprising: a cathode plate in the form of a field effect emission device including: a substrate and an emission layer on one face of the substrate, the emission layer having: a multiplicity of emitters and gates, arranged as an array of emission pixels and conductive connections in the emission layer to the emitters and the gates; the substrate having: first conductive vias provided through the substrate or at least a front layer thereof to at least some of the said conductive connections in the emission layer for electrical connection to their emitters and gates and second conductive vias depending from a back layer of the cathode plate, and an anode plate; characterised in that it includes: a separate back plate, wherein the cathode plate back layer is carried on the front side of the back plate, the back plate being continuous across the back side of the cathode plate; and a frame connecting the back plate to the anode plate; and further wherein for connection to the cathode plate, the back plate has vias in a front layer positioned to connect via solder connections with the second vias depending from the conductive back layer of the cathode plate.