Abstract: In an apparatus and a method of uniformly forming a high quality thin layer, first and second gas lines are arranged on an inner surface of a processing chamber alternately with and spaced apart from each other by a same interval. The first and second gas lines have the same shape, and are positioned on a circumferential line farther than a peripheral portion of the substrate from the central axis of the substrate. An injection hole is formed on a shear plane of the gas lines. A first source gas, a reaction gas and a subsidiary gas area are supplied through the first gas line, and a second source gas is supplied through the second gas line. Accordingly, because of the spacing of the gas lines from the substrate, particles are prevented from being dropping onto the substrate and the apparatus may be repaired in a much shorter time, thereby remarkably improving maintenance efficiency of the apparatus.

Abstract: An electron gun for a color picture tube which allows the foci of electron beams to coincide with one another. Making an eccentricity between beam-passing apertures and holes on partitions, the electron gun reinforces an electron lens effect, so that the foci of electron beams can coincide with one another.