▎ 摘　　要

NOVELTY - Electron-emitting element comprises an electronic acceleration layer which consists of insulating films (2), an electrode, and a coating membrane (10) which are provided with a laminated structure laminated in order. The electrode transmits an electron and discharges electrons from the surface. The coating membrane is a film which transmits the electron, and the electrode is a protective film of a different material, and comprises an electron emission surface. USE - Electron-emitting element e.g. cold cathode-type electron source and hot cathode type electron source used for planar display apparatus, illumination, hydrogen-producing apparatus and electron microscope. ADVANTAGE - The electron-emitting element has excellent electron emission efficiency, and is operated stably. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the electron emission element. Lower electrode (1) Thick insulation film (2) Electron transmission electrode (3) Electron emission surface (6) Coating film (10)