Patent ID: 6372530
Filing Date: 2002-04-16
Classification: H01J

Abstract:
A method of forming a cold cathode emission device, comprising:forming a drain having a first conductivity and a first width in a substrate having a second conductivity; removing a portion of the drain and the substrate to form an emitter tip that projects upwardly from the drain, the emitter tip further having a base with a second width, the base being integral with the drain, and the first width being greater than the second width to form a remaining portion that extends outwardly from the base of the emitter tip; forming a source having a first conductivity in the substrate, the source being spaced apart from the remaining portion of the drain to form a channel region therebetween; forming a gate insulator over the channel region, the gate insulator having a first end that at least partially overlays the remaining portion of the drain; forming a gate over the gate insulator, the gate having a first end that overlays the first end of the gate insulator; and forming a field oxide isolation structure on the remaining portion of the drain, the field oxide structure being substantially adjacent to the emitter tip and abutting the first end of the gate insulator and the first end of the gate.