Patent ID: 9441293
Filing Date: 2016-09-13
CPC Classification: C23C

Claim Text:
1. A film-forming apparatus that forms a film by sequentially supplying a plurality of kinds of reaction gases which react with each other to a substrate within a processing chamber having a vacuum atmosphere and supplying a replacement gas between supply of one reaction gas and supply of next reaction gas, the film-forming apparatus comprising: a placing unit provided in the processing chamber to place the substrate thereon; a ceiling section provided to face the placing unit; an exhaust unit configured to perform vacuum exhaust of an inside of the processing chamber; a central gas ejecting unit disposed above a central portion of the substrate placed on the placing unit, the central gas ejecting unit including one or more gas ejecting ports formed to spread the gases in a horizontal direction toward an outer side; and a peripheral gas supply unit disposed at a position above an area between a central portion and an outer circumference of the substrate to surround the central gas ejecting unit, wherein the peripheral gas supply unit includes an annular member formed in an annular shape to surround the central gas ejecting unit, with a plurality of gas dispersion units formed in a hollow shape and provided within the annular member and spaced apart from each other in a circumferential direction, and with a plurality of gas ejecting ports formed and spaced apart along the circumferential direction at each of an inner circumferential surface side and an outer circumferential side of the annular member so that gases dispersed by the gas dispersion units spread through the gas ejecting ports formed in the outer circumferential surface side of the annular member in a horizontal direction toward the outer circumferential side of the substrate and gases dispersed by the gas dispersion units spread through the gas ejecting ports formed in the inner circumferential surface side of the annual member in a horizontal direction toward the central side of the substrate.