The present invention provides an electron emission material that is
excellent in electron emission characteristics, a method of manufacturing
the same, as well as an electron emission element. The method is a method
of manufacturing an electron emission material including a carbon
material obtained by baking a polymer film. In the method, a polyamic
acid solution is prepared in which at least one metallic compound
selected from a metal oxide and a metal carbonate is dispersed; the
polyamic acid solution thus prepared is formed into a film and then is
imidized to form a polyimide film including the metallic compound; and
then the polyimide film thus formed is baked to form the carbon material.
The electron emission material is formed so that it includes a carbon
material, a protrusion having a concavity in its surface is formed at the
surface of the carbon material, and the protrusion includes a metallic
element.