Electron-emitting device, electron beam apparatus using the electron-emitting device, and image display apparatus

摘要

In an electron beam apparatus including a lamination electron emitting device, it is an object to enhance electron emission efficiency by controlling an electron emission point at which electrons are emitted. In the device, an insulating member (3) and a gate (5) are formed on a substrate (1), a recess portion (7) is formed in the insulating member, a protruding portion protruding from an edge of the recess portion toward the gate is provided at an end in opposition to the gate, of a cathode (6) arranged on a side surface of the insulating member, and convex portions at a distance of not less than 1 nm and not more than 5 nm from the gate in a width direction of the protruding portion are included in a density of 10% or less in a width direction of the cathode.