▎ 摘　　要

NOVELTY - A carbon film (20) comprises graphene sheet multilayer overlaps, having an internal hollow, and a radius is provided with acicular shape which becomes small towards a tip. USE - As a carbon film (claimed); for a tip performing field emission; for forming low impressed electromotive force; for a source of field electron emission of a field emission type lighting lamp, and a high-intensity lighting lamp. ADVANTAGE - The carbon film is remarkably excellent in current voltage field emission characteristic (IV characteristic); provides IV characteristic that the emission current which can carry out the luminescence start of the fluorescent substance with the lower impressed electromotive force V. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for forming at least two units of the carbon film as a set on the substrate involving forming carbon film set units are stem-like carbon films a branch-like carbon film group currently by apply to the film lower part from film halfway of this stem-like carbon film and the stem-like carbon film concerned may surrounded, where the carbon film structure comprising a stem-like shape to which, as for the stem-like carbon films, graphene sheet multilayeredly overlaped that it is becoming internally hollow with a radius becoming small towards a tip. DESCRIPTION OF DRAWING(S) - The figure shows composition of the carbon film. Carbon film set unit (12) Needlelike stem-like carbon film (14) Branch-like carbon film group (16) Muscle-like level difference part (18) Carbon film (20)