Patent ID: 7667380

Claim:
An electron emission device comprising: first and second substrates facing each other at a distance; cathode electrodes on the first substrate; electron emission regions on the cathode electrodes; a first insulating layer on the cathode electrodes with first insulating layer opening portions exposing the electron emission regions; gate electrodes on the first insulating layer with gate electrode opening portions corresponding to the first insulating layer opening portions; and a second insulating layer on the gate electrodes with second insulating layer opening portions each exposing a plurality of the first insulating layer opening portions, wherein the cathode electrodes and the gate electrodes each comprise a thin film deposition, and the insulating layer comprises a thick film layer; wherein the cathode electrodes and the gate electrodes respectively have a thickness ranging from 2,000 Å to 3,000 Å; wherein the gate electrode opening portions have a width larger than the insulating layer opening portions; and wherein a top surface of the second insulating layer adjacent to the second insulating layer opening portions is substantially flat.