Ion plating apparatus

摘要

An ion plating apparatus having a plurality of vapor sources for supplying the vapors of evaporating materials, the particles of the vapors being ionized and accelerated by an electric field to impinge on the surface of a substrate so as to form a film of the evaporating materials thereon is disclosed. An ionization chamber common to a plurality of the vapor sources, the ionization chamber being composed of parallel filaments for emitting electrons is also disclosed. Grid-shaped electron-accelerating electrodes are provided between the filaments so that the vapors of the evaporating materials pass between them, and the electron-accelerating electrodes kept at a positive potential with respect to the filaments thereby to ionize the vapors of the evaporating materials.