Electron emission device, electron emission display device using the same and method of manufacturing the same

A method of manufacturing an electron emission device, comprising:

• forming a plurality of cathode electrodes on a substrate;
• forming an insulating layer on the substrate;
• forming a plurality of openings in the insulating layer, each opening of the insulating layer having upper and lower opening portions;
• forming a plurality of gate electrodes on the insulating layer, the gate electrodes having openings communicating with corresponding opening of the insulating layer;
• and
• forming a plurality of electron emission regions on the cathode electrodes inside the lower opening portions of the insulating layer.

An electron emission display, comprising:

• first and second substrates facing each other and spaced apart from each other;
• a plurality of cathode electrodes formed on the first substrate;
• a plurality of electron emission regions electrically coupled to the cathode electrodes;
• an insulating layer formed on the first substrate and covering the cathode electrodes;
• a plurality of gate electrodes formed on the insulating layer and crossing the cathode electrodes,
• a plurality of phosphor layers formed on the second substrate;
• and
• an anode electrode formed on one surface of the phosphor layers,
• wherein the insulating layer includes a plurality of openings exposing corresponding electron emission regions, each opening having at least two opening portions in communication with each other and having different sizes from each other, and
• the gate electrodes include openings in communication with corresponding openings of the insulating layer.