Patent ID: 6583578
Filing Date: 2003-06-24
Classification: B82Y,H01J

Abstract:
A field emission-type electron source comprising:an electrically conductive substrate; a strong electric field drift layer formed on a surface of said electrically conductive substrate; and an electrically conductive thin film formed on said strong electric field drift layer, in which electrons injected into said strong electric field drift layer from said electrically conductive substrate, drift in said strong electric field drift layer to be emitted outward through said electrically conductive thin film by applying a voltage between said electrically conductive thin film and said electrically conductive substrate in such a manner that said electrically conductive thin film acts as a positive electrode against said electrically conductive substrate, wherein said electrically conductive thin film has low density of states in an energy region near energy of the emitted electrons, and at least one of high adhesion for said strong electric field drift layer and high sublimation enthalpy.