Patent ID: 7075223

Claim:
An electron beam apparatus, comprising: an electron source including an electron-emitting device; an electron beam irradiation member which is opposed to the electron source and irradiated with an electron emitted from the electron-emitting device; a potential specifying plate which is located between the electron source and the electron beam irradiation member and which includes a plurality of openings through which the electron emitted from the electron-emitting device transmits; and a spacer located between the electron beam irradiation member and the potential specifying plate, wherein D 1 defined as a distance between a portion of the potential specifying plate between one opening, of the plurality of openings of the potential specifying plate, near the spacer and the spacer and the electron beam irradiation member, and D 2 defined as a distance between a portion of the potential specifying plate between the one opening of the potential specifying plate near the spacer and another opening of the plurality of openings of the potential specifying plate not near the spacer and the electron beam irradiation member, meet a relationship D 1 <D 2 .