Patent ID: 6522053
Filing Date: 2003-02-18
Classification: H01J

Abstract:
A field emission display having a field emission element, said field emission element comprising:a gate electrode formed on a substrate, and a cathode electrode laminated to said gate electrode through an insulating layer, said gate electrode having an opening, said substrate being provided with a substrate through-hole therein, said substrate through-hole being of a planar shape corresponding to that of said opening at a position matched with said opening, said cathode electrode having a hole of a planar shape corresponding to that of said opening at a position matched with said opening, said insulating layer having a through-hole continuous to said opening and said hole; wherein a lower edge portion of said hole is formed into a cross-sectional shape having an edge angle in a range of 80 to 100Â°; and at least part of said lower edge portion of said hole is exposed in said insulating layer through-hole; whereby electrons are emitted from said cathode electrode through said lower edge portion of said hole exposed in said insulating layer through-hole by applying a specific voltage between said gate electrode and said cathode electrode.