Patent ID: 6927534
Filing Date: 2005-08-09
Classification: H01J

Abstract:
1. A field emission device (FED) comprising: a substrate; a cathode formed over the substrate; micro-tips having nano-sized surface features, each micro-tip including the nanosized surface features being of a single integral homogeneous material, formed on the cathode; a gate insulation layer with wells in which a single micro-tip is located, the gate insulation layer formed over the substrate; a gate electrode with gates aligned with the wells such that the micro-tips are exposed through a corresponding gate, the gate electrode formed on the gate insulation layer; a focus gate insulation layer having openings to which one or more gates correspond, the focus gate insulation layer formed on the gate electrode; and a focus gate electrode with focus gates aligned with the openings of the focus gate insulation layer, the focus gate electrode formed on the focus gate insulation layer.