Patent ID: 6520820
Filing Date: 2003-02-18
Classification: H01J

Abstract:
A process for the production of a cold cathode field emission device comprising the steps of;(a) forming a cathode electrode on a support, (b) forming an insulating layer on the support and the cathode electrode, (c) forming a gate electrode on the insulating layer, (d) forming an opening portion which penetrates through at least the insulating layer and has a bottom portion where the cathode electrode is exposed, (e) forming a conductive material layer for forming an electron emitting portion on the entire surface including the inside of the opening portion, (f) forming a mask material layer on the conductive material layer so as to mask a region of the conductive material layer positioned in the central portion of the opening portion, and (g) etching the conductive material layer and the mask material layer under an anisotropic etching condition where an etch rate of the conductive material layer in the direction perpendicular to the support is larger than an etch rate of the mask material layer in the direction perpendicular to the support, to form, in the opening portion, the electron emitting portion which is composed of the conductive material layer and has a tip portion having a conical form.