Patent ID: 7132304

Claim:
A method of manufacturing a field emission device which includes a glass substrate, a transparent electrode formed on the glass substrate, a carbon nanotube (CNT) emitter formed on the emitter electrode, and a gate stack formed around the CNT emitter for extracting electron beams from the CNT emitter and focusing the extracted electron beams onto a given position, wherein forming of the gate stack around the CNT emitter comprises the steps of: (a) forming a mask layer on the glass substrate to partially expose the transparent electrode through a via hole; (b) forming a gate insulating layer on the mask layer so as to fill the via hole; (c) patterning the gate insulating layer around the via hole so as to expose the transparent electrode; (d) forming an electrode on the gate insulating layer around the via hole; (e) removing a portion of the electrode disposed at an edge area between an inclined plane and a top plane of the gate insulating layer; (f) sequentially forming the focus gate insulating layer and the focus gate electrode on a remaining portion of the electrode after step (e); and (g) patterning the focus gate electrode and the focus gate insulating layer around the via hole so as to expose the transparent electrode through the via hole.