Patent ID: 8035294
Filing Date: 2011-10-11
Classification: H01J

Abstract:
1. An electron beam apparatus comprising: an insulating member that includes a recess in a surface thereof; a gate that is located in the surface of the insulating member; a cathode that includes a projection portion projected from an edge of the recess toward the gate, and being located in the surface of the insulating member so that the projection portion is opposite the gate; and an anode that is disposed opposite the projection portion with the gate interposed therebetween, wherein, in a direction in which the insulating member and the gate are laminated, the projection portion of the cathode has a height distribution, and an average value dav (m) of a shortest distance between the gate and the projection portion of the cathode, and a difference h (m) between the average value dav (m) and a shortest distance dmin (m) from the gate to a maximum convex portion of the projection portion of the cathode satisfy the following relationship: