▎ 摘　　要

NOVELTY - A compound multi wall carbon nanotube is obtained by coupling several multi wall carbon nanotubes (16a) with graphene sheet (18a,18b) by coupling form. The multi wall carbon nanotubes are mutually coupled along the length direction. USE - Compound multi wall carbon nanotube for electron-emission material used for electronic emitter (both claimed) for display device. ADVANTAGE - The compound multi wall carbon nanotube enables stable electron emission over a long period of time. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of compound multi wall carbon nanotube. Multi wall carbon nanotube (16a) Graphene sheet (18a,18b)