Electron emitting device using graphene and method for manufacturing same

A method for manufacturing an electron emitting device, the method comprising:

• preparing a metal holder having a slot;
• preparing an emitter plate comprising an emitter supporting member and a graphene emitter attached onto the emitter supporting member;
• locating the metal holder on a supporter and then inserting the emitter plate into the slot of the metal holder;
• allowing the emitter plate to protrude from a first surface of the metal holder by a predetermined height;
• forming an insulation layer on the first surface of the metal holder;
• preparing a gate electrode comprising a gate supporting member and a graphene gate attached onto the gate supporting member;
• and
• providing the gate electrode on the insulation layer.

An electron emitting device array comprising a plurality of electron emitting devices arranged in two dimensions, each of the electron emitting devices comprising:

• a metal holder having at least one slot;
• at least one emitter plate inserted into the slot to protrude from a first surface of the metal holder, and comprising an emitter supporting member and a graphene emitter attached onto the emitter supporting member;
• an insulation layer provided on the first surface of the metal holder;
• and
• a gate electrode provided on the insulation layer and comprising a gate supporting member and a graphene gate attached onto the gate supporting member.