Patent ID: 7459841
Filing Date: 2008-12-02
Classification: H01J

Abstract:
1. An electron beam apparatus comprising: a first substrate having a plurality of electron emitting devices and a first conductor held between some of the electron emitting devices and set at a low potential; a second substrate disposed in opposition to the first substrate and having a second conductor set at a potential higher than that of the first conductor; and a spacer disposed along the first conductor and covered with a resistance film contacting the first conductor and the second conductor, wherein a surface covered with the resistance film of the spacer at the side contacting the first conductor and/or second conductor has a concave portion arranged to be almost symmetric with respect to a center line of the spacer parallel to a normal line of the first substrate and/or second substrate, and the center line being within the cross section of the spacer along a plane parallel to the normal line and including the electron emitting devices disposed in sandwiching the spacer, wherein the height of the concave portion is larger than the surface roughness of the first conductor and/or second conductor.